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<li class="toctree-l1"><a class="reference internal" href="quickstart.html">QuickStart</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">Standard Examples</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#lox-lh2-performance">LOX/LH2 Performance</a></li>
<li class="toctree-l2"><a class="reference internal" href="#transport-properties">Transport Properties</a></li>
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<li class="toctree-l1"><a class="reference internal" href="propellant_select.html">Propellant Selection</a></li>
<li class="toctree-l1"><a class="reference internal" href="propellants.html">Propellants</a></li>
<li class="toctree-l1"><a class="reference internal" href="new_propellants.html">New Propellants</a></li>
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<div class="section" id="standard-examples">
<span id="std-examples-link"></span><h1>Standard Examples<a class="headerlink" href="#standard-examples" title="Permalink to this headline">¶</a></h1>
<p>For those with <a class="reference external" href="https://www.grc.nasa.gov/WWW/CEAWeb/ceaHome.htm">NASA CEA</a> experience,
running CEA and reviewing the printed output is standard practice.</p>
<p>The following examples show how to run a case and review the standard
<a class="reference external" href="https://www.grc.nasa.gov/WWW/CEAWeb/ceaHome.htm">CEA</a> output.</p>
<p>RocketCEA always begins with an import statement and an instance of a CEA_obj:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">rocketcea.cea_obj</span> <span class="kn">import</span> <span class="n">CEA_Obj</span>
<span class="n">ispObj</span> <span class="o">=</span> <span class="n">CEA_Obj</span><span class="p">(</span> <span class="n">oxName</span><span class="o">=</span><span class="s1">'LOX'</span><span class="p">,</span> <span class="n">fuelName</span><span class="o">=</span><span class="s1">'LH2'</span><span class="p">)</span>
</pre></div>
</div>
<p>Instead of manually assembling a run deck for CEA, the above is all that is needed to run a CEA <strong>rocket</strong> case with standard
definitions of all the most common rocket propellants.</p>
<div class="section" id="lox-lh2-performance">
<span id="example-1-link"></span><h2>LOX/LH2 Performance<a class="headerlink" href="#lox-lh2-performance" title="Permalink to this headline">¶</a></h2>
<p>The script below is typical to calculate predicted equilibrium performance at a specific
chamber pressure, mixture ratio and expansion ratio.</p>
<p>The script uses the <strong>short</strong> output option. (long-form output is default)</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>
<span class="kn">from</span> <span class="nn">rocketcea.cea_obj</span> <span class="kn">import</span> <span class="n">CEA_Obj</span>
<span class="n">ispObj</span> <span class="o">=</span> <span class="n">CEA_Obj</span><span class="p">(</span> <span class="n">oxName</span><span class="o">=</span><span class="s1">'LOX'</span><span class="p">,</span> <span class="n">fuelName</span><span class="o">=</span><span class="s1">'LH2'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="nb">print</span><span class="p">(</span> <span class="n">s</span> <span class="p">)</span>
</pre></div>
</div>
<p>Notice that RocketCEA generates the propellant cards and input parameters for the <strong>rocket equilibrium</strong> problem.
(as opposed to a <strong>shock</strong> or <strong>detonation</strong> problem)</p>
<p>The propellant temperature and enthalpy are <em>standard</em>, which usually means room temperature for storable or gas
propellants and normal boiling point for cryogenic propellants.</p>
<p>See the <a class="reference internal" href="temperature_adjust.html#temperature-adjust-link"><span class="std std-ref">Temperature Adjust</span></a> page for modifying the temperature and enthalpy of the reactants.</p>
<p>Notice also that the CEA documentation (shown below) allows for different pressure units to be used for Pc.
The default units in <strong>RocketCEA</strong> are psia, however, bar, atm and mmh are also options.</p>
<img alt="_images/full_output_p_units.jpg" src="_images/full_output_p_units.jpg" />
<p>Pc units can be specified with the input parameter <strong>pc_units</strong> as shown in the following lines:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">pc_units</span><span class="o">=</span><span class="s1">'psia'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">68.948</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">pc_units</span><span class="o">=</span><span class="s1">'bar'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">68.046</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">pc_units</span><span class="o">=</span><span class="s1">'atm'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">51715.</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">pc_units</span><span class="o">=</span><span class="s1">'mmh'</span><span class="p">)</span>
</pre></div>
</div>
<p id="std-examples-mole-frac-link">The above script gives the standard output that a typical CEA run from the command prompt would give:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">*******************************************************************************</span>
<span class="n">NASA</span><span class="o">-</span><span class="n">GLENN</span> <span class="n">CHEMICAL</span> <span class="n">EQUILIBRIUM</span> <span class="n">PROGRAM</span> <span class="n">CEA</span><span class="p">,</span> <span class="n">OCTOBER</span> <span class="mi">18</span><span class="p">,</span> <span class="mi">2002</span>
<span class="n">BY</span> <span class="n">BONNIE</span> <span class="n">MCBRIDE</span> <span class="n">AND</span> <span class="n">SANFORD</span> <span class="n">GORDON</span>
<span class="n">REFS</span><span class="p">:</span> <span class="n">NASA</span> <span class="n">RP</span><span class="o">-</span><span class="mi">1311</span><span class="p">,</span> <span class="n">PART</span> <span class="n">I</span><span class="p">,</span> <span class="mi">1994</span> <span class="n">AND</span> <span class="n">NASA</span> <span class="n">RP</span><span class="o">-</span><span class="mi">1311</span><span class="p">,</span> <span class="n">PART</span> <span class="n">II</span><span class="p">,</span> <span class="mi">1996</span>
<span class="o">*******************************************************************************</span>
<span class="n">reac</span>
<span class="n">fuel</span> <span class="n">H2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="n">H</span> <span class="mi">2</span>
<span class="n">h</span><span class="p">,</span><span class="n">cal</span><span class="o">=-</span><span class="mf">2154.0</span> <span class="n">t</span><span class="p">(</span><span class="n">k</span><span class="p">)</span><span class="o">=</span><span class="mf">20.27</span> <span class="n">wt</span><span class="o">%=</span><span class="mf">100.</span>
<span class="n">oxid</span> <span class="n">O2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="n">O</span> <span class="mi">2</span>
<span class="n">h</span><span class="p">,</span><span class="n">cal</span><span class="o">=-</span><span class="mf">3102.</span> <span class="n">t</span><span class="p">(</span><span class="n">k</span><span class="p">)</span><span class="o">=</span><span class="mf">90.18</span> <span class="n">wt</span><span class="o">%=</span><span class="mf">100.</span>
<span class="n">prob</span> <span class="n">case</span><span class="o">=</span><span class="n">LOX_</span><span class="o">/</span><span class="n">_LH2</span>
<span class="n">rocket</span> <span class="n">equilibrium</span> <span class="n">p</span><span class="p">,</span><span class="n">psia</span><span class="o">=</span><span class="mf">1000.000000</span><span class="p">,</span> <span class="n">supar</span><span class="o">=</span><span class="mf">40.000000</span><span class="p">,</span>
<span class="n">o</span><span class="o">/</span><span class="n">f</span><span class="o">=</span><span class="mf">6.000000</span>
<span class="n">outp</span> <span class="n">calories</span> <span class="n">short</span>
<span class="n">end</span>
<span class="n">THEORETICAL</span> <span class="n">ROCKET</span> <span class="n">PERFORMANCE</span> <span class="n">ASSUMING</span> <span class="n">EQUILIBRIUM</span>
<span class="n">COMPOSITION</span> <span class="n">DURING</span> <span class="n">EXPANSION</span> <span class="n">FROM</span> <span class="n">INFINITE</span> <span class="n">AREA</span> <span class="n">COMBUSTOR</span>
<span class="n">Pinj</span> <span class="o">=</span> <span class="mf">1000.0</span> <span class="n">PSIA</span>
<span class="n">CASE</span> <span class="o">=</span> <span class="n">LOX_</span><span class="o">/</span><span class="n">_LH2</span>
<span class="n">REACTANT</span> <span class="n">WT</span> <span class="n">FRACTION</span> <span class="n">ENERGY</span> <span class="n">TEMP</span>
<span class="p">(</span><span class="n">SEE</span> <span class="n">NOTE</span><span class="p">)</span> <span class="n">CAL</span><span class="o">/</span><span class="n">MOL</span> <span class="n">K</span>
<span class="n">FUEL</span> <span class="n">H2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.0000000</span> <span class="o">-</span><span class="mf">2154.000</span> <span class="mf">20.270</span>
<span class="n">OXIDANT</span> <span class="n">O2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.0000000</span> <span class="o">-</span><span class="mf">3102.000</span> <span class="mf">90.180</span>
<span class="n">O</span><span class="o">/</span><span class="n">F</span><span class="o">=</span> <span class="mf">6.00000</span> <span class="o">%</span><span class="n">FUEL</span><span class="o">=</span> <span class="mf">14.285714</span> <span class="n">R</span><span class="p">,</span><span class="n">EQ</span><span class="o">.</span><span class="n">RATIO</span><span class="o">=</span> <span class="mf">1.322780</span> <span class="n">PHI</span><span class="p">,</span><span class="n">EQ</span><span class="o">.</span><span class="n">RATIO</span><span class="o">=</span> <span class="mf">1.322780</span>
<span class="n">CHAMBER</span> <span class="n">THROAT</span> <span class="n">EXIT</span>
<span class="n">Pinf</span><span class="o">/</span><span class="n">P</span> <span class="mf">1.0000</span> <span class="mf">1.7351</span> <span class="mf">459.06</span>
<span class="n">P</span><span class="p">,</span> <span class="n">ATM</span> <span class="mf">68.046</span> <span class="mf">39.216</span> <span class="mf">0.14823</span>
<span class="n">T</span><span class="p">,</span> <span class="n">K</span> <span class="mf">3483.35</span> <span class="mf">3291.03</span> <span class="mf">1440.95</span>
<span class="n">RHO</span><span class="p">,</span> <span class="n">G</span><span class="o">/</span><span class="n">CC</span> <span class="mf">3.2038</span><span class="o">-</span><span class="mi">3</span> <span class="mf">1.9758</span><span class="o">-</span><span class="mi">3</span> <span class="mf">1.7690</span><span class="o">-</span><span class="mi">5</span>
<span class="n">H</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">235.74</span> <span class="o">-</span><span class="mf">509.81</span> <span class="o">-</span><span class="mf">2372.54</span>
<span class="n">U</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">750.09</span> <span class="o">-</span><span class="mf">990.49</span> <span class="o">-</span><span class="mf">2575.47</span>
<span class="n">G</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">15090.3</span> <span class="o">-</span><span class="mf">14544.2</span> <span class="o">-</span><span class="mf">8517.40</span>
<span class="n">S</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span> <span class="mf">4.2644</span> <span class="mf">4.2644</span> <span class="mf">4.2644</span>
<span class="n">M</span><span class="p">,</span> <span class="p">(</span><span class="mi">1</span><span class="o">/</span><span class="n">n</span><span class="p">)</span> <span class="mf">13.458</span> <span class="mf">13.606</span> <span class="mf">14.111</span>
<span class="p">(</span><span class="n">dLV</span><span class="o">/</span><span class="n">dLP</span><span class="p">)</span><span class="n">t</span> <span class="o">-</span><span class="mf">1.02525</span> <span class="o">-</span><span class="mf">1.01954</span> <span class="o">-</span><span class="mf">1.00000</span>
<span class="p">(</span><span class="n">dLV</span><span class="o">/</span><span class="n">dLT</span><span class="p">)</span><span class="n">p</span> <span class="mf">1.4496</span> <span class="mf">1.3682</span> <span class="mf">1.0001</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span> <span class="mf">2.0951</span> <span class="mf">1.9171</span> <span class="mf">0.7308</span>
<span class="n">GAMMAs</span> <span class="mf">1.1401</span> <span class="mf">1.1403</span> <span class="mf">1.2388</span>
<span class="n">SON</span> <span class="n">VEL</span><span class="p">,</span><span class="n">M</span><span class="o">/</span><span class="n">SEC</span> <span class="mf">1566.3</span> <span class="mf">1514.4</span> <span class="mf">1025.6</span>
<span class="n">MACH</span> <span class="n">NUMBER</span> <span class="mf">0.000</span> <span class="mf">1.000</span> <span class="mf">4.123</span>
<span class="n">PERFORMANCE</span> <span class="n">PARAMETERS</span>
<span class="n">Ae</span><span class="o">/</span><span class="n">At</span> <span class="mf">1.00000</span> <span class="mf">40.000</span>
<span class="n">CSTAR</span><span class="p">,</span> <span class="n">FT</span><span class="o">/</span><span class="n">SEC</span> <span class="mf">7560.0</span> <span class="mf">7560.0</span>
<span class="n">CF</span> <span class="mf">0.6572</span> <span class="mf">1.8351</span>
<span class="n">Ivac</span><span class="p">,</span><span class="n">LB</span><span class="o">-</span><span class="n">SEC</span><span class="o">/</span><span class="n">LB</span> <span class="mf">289.8</span> <span class="mf">451.7</span>
<span class="n">Isp</span><span class="p">,</span> <span class="n">LB</span><span class="o">-</span><span class="n">SEC</span><span class="o">/</span><span class="n">LB</span> <span class="mf">154.4</span> <span class="mf">431.2</span>
<span class="n">MOLE</span> <span class="n">FRACTIONS</span>
<span class="o">*</span><span class="n">H</span> <span class="mf">0.03417</span> <span class="mf">0.02810</span> <span class="mf">0.00001</span>
<span class="n">HO2</span> <span class="mf">0.00003</span> <span class="mf">0.00002</span> <span class="mf">0.00000</span>
<span class="o">*</span><span class="n">H2</span> <span class="mf">0.24832</span> <span class="mf">0.24538</span> <span class="mf">0.24401</span>
<span class="n">H2O</span> <span class="mf">0.66590</span> <span class="mf">0.68751</span> <span class="mf">0.75598</span>
<span class="n">H2O2</span> <span class="mf">0.00001</span> <span class="mf">0.00001</span> <span class="mf">0.00000</span>
<span class="o">*</span><span class="n">O</span> <span class="mf">0.00334</span> <span class="mf">0.00217</span> <span class="mf">0.00000</span>
<span class="o">*</span><span class="n">OH</span> <span class="mf">0.04478</span> <span class="mf">0.03446</span> <span class="mf">0.00000</span>
<span class="o">*</span><span class="n">O2</span> <span class="mf">0.00345</span> <span class="mf">0.00236</span> <span class="mf">0.00000</span>
<span class="o">*</span> <span class="n">THERMODYNAMIC</span> <span class="n">PROPERTIES</span> <span class="n">FITTED</span> <span class="n">TO</span> <span class="mf">20000.</span><span class="n">K</span>
<span class="n">NOTE</span><span class="o">.</span> <span class="n">WEIGHT</span> <span class="n">FRACTION</span> <span class="n">OF</span> <span class="n">FUEL</span> <span class="n">IN</span> <span class="n">TOTAL</span> <span class="n">FUELS</span> <span class="n">AND</span> <span class="n">OF</span> <span class="n">OXIDANT</span> <span class="n">IN</span> <span class="n">TOTAL</span> <span class="n">OXIDANTS</span>
</pre></div>
</div>
</div>
<div class="section" id="transport-properties">
<h2>Transport Properties<a class="headerlink" href="#transport-properties" title="Permalink to this headline">¶</a></h2>
<p>New in RocketCEA version 1.06,
to include transport properties, set the <strong>show_transport</strong> flag.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>
<span class="kn">from</span> <span class="nn">rocketcea.cea_obj</span> <span class="kn">import</span> <span class="n">CEA_Obj</span>
<span class="n">ispObj</span> <span class="o">=</span> <span class="n">CEA_Obj</span><span class="p">(</span> <span class="n">oxName</span><span class="o">=</span><span class="s1">'LOX'</span><span class="p">,</span> <span class="n">fuelName</span><span class="o">=</span><span class="s1">'LH2'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span>
<span class="n">short_output</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">show_transport</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="nb">print</span><span class="p">(</span> <span class="n">s</span> <span class="p">)</span>
</pre></div>
</div>
<p>which adds the following lines to the output:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">TRANSPORT</span> <span class="n">PROPERTIES</span> <span class="p">(</span><span class="n">GASES</span> <span class="n">ONLY</span><span class="p">)</span>
<span class="n">CONDUCTIVITY</span> <span class="n">IN</span> <span class="n">UNITS</span> <span class="n">OF</span> <span class="n">MILLICALORIES</span><span class="o">/</span><span class="p">(</span><span class="n">CM</span><span class="p">)(</span><span class="n">K</span><span class="p">)(</span><span class="n">SEC</span><span class="p">)</span>
<span class="n">VISC</span><span class="p">,</span><span class="n">MILLIPOISE</span> <span class="mf">1.0588</span> <span class="mf">1.0153</span> <span class="mf">0.43328</span>
<span class="n">WITH</span> <span class="n">FROZEN</span> <span class="n">REACTIONS</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span> <span class="mf">0.9029</span> <span class="mf">0.8950</span> <span class="mf">0.6859</span>
<span class="n">CONDUCTIVITY</span> <span class="mf">1.3519</span> <span class="mf">1.2760</span> <span class="mf">0.4369</span>
<span class="n">PRANDTL</span> <span class="n">NUMBER</span> <span class="mf">0.7071</span> <span class="mf">0.7121</span> <span class="mf">0.6803</span>
</pre></div>
</div>
<p>To access transport properties, each of the following calls return a tuple of
(Heat Capacity, Viscosity, Thermal Conductivity and Prandtl Number):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Chamber_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">)</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Chamber_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">frozen</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Throat_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">)</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Throat_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">frozen</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Exit_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">)</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">visc</span><span class="p">,</span> <span class="n">cond</span><span class="p">,</span> <span class="n">Pr</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_Exit_Transport</span><span class="p">(</span><span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">frozen</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
</div>
<p>where the <strong>frozen</strong> flag determines equilibrium or frozen output.</p>
<p>The standard units will be the same as the printout, namely:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Cp</span> <span class="o">=</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span>
<span class="n">visc</span> <span class="o">=</span> <span class="n">MILLIPOISE</span>
<span class="n">cond</span> <span class="o">=</span> <span class="n">MILLICALORIES</span><span class="o">/</span><span class="p">(</span><span class="n">CM</span><span class="p">)(</span><span class="n">K</span><span class="p">)(</span><span class="n">SEC</span><span class="p">)</span>
<span class="n">Pr</span> <span class="o">=</span> <span class="n">dimensionless</span>
</pre></div>
</div>
<p>If different units are desired, use the <strong>cea_obj_w_units</strong> wrapper, for example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">rocketcea.cea_obj_w_units</span> <span class="kn">import</span> <span class="n">CEA_Obj</span>
<span class="n">C</span> <span class="o">=</span> <span class="n">CEA_Obj</span><span class="p">(</span> <span class="n">oxName</span><span class="o">=</span><span class="s1">'LOX'</span><span class="p">,</span> <span class="n">fuelName</span><span class="o">=</span><span class="s1">'LH2'</span><span class="p">,</span>
<span class="n">specific_heat_units</span><span class="o">=</span><span class="s1">'kJ/kg-K'</span><span class="p">,</span>
<span class="n">viscosity_units</span><span class="o">=</span><span class="s1">'poise'</span><span class="p">,</span>
<span class="n">thermal_cond_units</span><span class="o">=</span><span class="s1">'BTU/s-in-degF'</span><span class="p">)</span>
</pre></div>
</div>
</div>
<div class="section" id="frozen-performance">
<h2>Frozen Performance<a class="headerlink" href="#frozen-performance" title="Permalink to this headline">¶</a></h2>
<p>To run the same LOX/LH2 case above, but with frozen composition during expansion, the following script is used.</p>
<p>Notice here that the flag to freeze the composition at the throat is set.
Otherwise, the chamber composition is used.</p>
<p>Also notice that without the short output flag, the long form of output results.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>
<span class="kn">from</span> <span class="nn">rocketcea.cea_obj</span> <span class="kn">import</span> <span class="n">CEA_Obj</span>
<span class="n">ispObj</span> <span class="o">=</span> <span class="n">CEA_Obj</span><span class="p">(</span> <span class="n">oxName</span><span class="o">=</span><span class="s1">'LOX'</span><span class="p">,</span> <span class="n">fuelName</span><span class="o">=</span><span class="s1">'LH2'</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">ispObj</span><span class="o">.</span><span class="n">get_full_cea_output</span><span class="p">(</span> <span class="n">Pc</span><span class="o">=</span><span class="mf">1000.0</span><span class="p">,</span> <span class="n">MR</span><span class="o">=</span><span class="mf">6.0</span><span class="p">,</span> <span class="n">eps</span><span class="o">=</span><span class="mf">40.0</span><span class="p">,</span> <span class="n">frozen</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">frozenAtThroat</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="nb">print</span><span class="p">(</span> <span class="n">s</span> <span class="p">)</span>
</pre></div>
</div>
<p>The result are shown below:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">*******************************************************************************</span>
<span class="n">NASA</span><span class="o">-</span><span class="n">GLENN</span> <span class="n">CHEMICAL</span> <span class="n">EQUILIBRIUM</span> <span class="n">PROGRAM</span> <span class="n">CEA</span><span class="p">,</span> <span class="n">OCTOBER</span> <span class="mi">18</span><span class="p">,</span> <span class="mi">2002</span>
<span class="n">BY</span> <span class="n">BONNIE</span> <span class="n">MCBRIDE</span> <span class="n">AND</span> <span class="n">SANFORD</span> <span class="n">GORDON</span>
<span class="n">REFS</span><span class="p">:</span> <span class="n">NASA</span> <span class="n">RP</span><span class="o">-</span><span class="mi">1311</span><span class="p">,</span> <span class="n">PART</span> <span class="n">I</span><span class="p">,</span> <span class="mi">1994</span> <span class="n">AND</span> <span class="n">NASA</span> <span class="n">RP</span><span class="o">-</span><span class="mi">1311</span><span class="p">,</span> <span class="n">PART</span> <span class="n">II</span><span class="p">,</span> <span class="mi">1996</span>
<span class="o">*******************************************************************************</span>
<span class="n">reac</span>
<span class="n">fuel</span> <span class="n">H2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="n">H</span> <span class="mi">2</span>
<span class="n">h</span><span class="p">,</span><span class="n">cal</span><span class="o">=-</span><span class="mf">2154.0</span> <span class="n">t</span><span class="p">(</span><span class="n">k</span><span class="p">)</span><span class="o">=</span><span class="mf">20.27</span> <span class="n">wt</span><span class="o">%=</span><span class="mf">100.</span>
<span class="n">oxid</span> <span class="n">O2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="n">O</span> <span class="mi">2</span>
<span class="n">h</span><span class="p">,</span><span class="n">cal</span><span class="o">=-</span><span class="mf">3102.</span> <span class="n">t</span><span class="p">(</span><span class="n">k</span><span class="p">)</span><span class="o">=</span><span class="mf">90.18</span> <span class="n">wt</span><span class="o">%=</span><span class="mf">100.</span>
<span class="n">prob</span> <span class="n">case</span><span class="o">=</span><span class="n">LOX_</span><span class="o">/</span><span class="n">_LH2</span>
<span class="n">rocket</span> <span class="n">frozen</span> <span class="n">nfz</span><span class="o">=</span><span class="mi">2</span> <span class="n">p</span><span class="p">,</span><span class="n">psia</span><span class="o">=</span><span class="mf">1000.000000</span><span class="p">,</span> <span class="n">supar</span><span class="o">=</span><span class="mf">40.000000</span><span class="p">,</span>
<span class="n">o</span><span class="o">/</span><span class="n">f</span><span class="o">=</span><span class="mf">6.000000</span>
<span class="n">outp</span> <span class="n">calories</span>
<span class="n">end</span>
<span class="n">OPTIONS</span><span class="p">:</span> <span class="n">TP</span><span class="o">=</span><span class="n">F</span> <span class="n">HP</span><span class="o">=</span><span class="n">F</span> <span class="n">SP</span><span class="o">=</span><span class="n">F</span> <span class="n">TV</span><span class="o">=</span><span class="n">F</span> <span class="n">UV</span><span class="o">=</span><span class="n">F</span> <span class="n">SV</span><span class="o">=</span><span class="n">F</span> <span class="n">DETN</span><span class="o">=</span><span class="n">F</span> <span class="n">SHOCK</span><span class="o">=</span><span class="n">F</span> <span class="n">REFL</span><span class="o">=</span><span class="n">F</span> <span class="n">INCD</span><span class="o">=</span><span class="n">F</span>
<span class="n">RKT</span><span class="o">=</span><span class="n">T</span> <span class="n">FROZ</span><span class="o">=</span><span class="n">T</span> <span class="n">EQL</span><span class="o">=</span><span class="n">F</span> <span class="n">IONS</span><span class="o">=</span><span class="n">F</span> <span class="n">SIUNIT</span><span class="o">=</span><span class="n">F</span> <span class="n">DEBUGF</span><span class="o">=</span><span class="n">F</span> <span class="n">SHKDBG</span><span class="o">=</span><span class="n">F</span> <span class="n">DETDBG</span><span class="o">=</span><span class="n">F</span> <span class="n">TRNSPT</span><span class="o">=</span><span class="n">F</span>
<span class="n">TRACE</span><span class="o">=</span> <span class="mf">0.00E+00</span> <span class="n">S</span><span class="o">/</span><span class="n">R</span><span class="o">=</span> <span class="mf">0.000000E+00</span> <span class="n">H</span><span class="o">/</span><span class="n">R</span><span class="o">=</span> <span class="mf">0.000000E+00</span> <span class="n">U</span><span class="o">/</span><span class="n">R</span><span class="o">=</span> <span class="mf">0.000000E+00</span>
<span class="n">Pc</span><span class="p">,</span><span class="n">BAR</span> <span class="o">=</span> <span class="mf">68.947304</span>
<span class="n">Pc</span><span class="o">/</span><span class="n">P</span> <span class="o">=</span>
<span class="n">SUBSONIC</span> <span class="n">AREA</span> <span class="n">RATIOS</span> <span class="o">=</span>
<span class="n">SUPERSONIC</span> <span class="n">AREA</span> <span class="n">RATIOS</span> <span class="o">=</span> <span class="mf">40.0000</span>
<span class="n">NFZ</span><span class="o">=</span> <span class="mi">2</span> <span class="n">Mdot</span><span class="o">/</span><span class="n">Ac</span><span class="o">=</span> <span class="mf">0.000000E+00</span> <span class="n">Ac</span><span class="o">/</span><span class="n">At</span><span class="o">=</span> <span class="mf">0.000000E+00</span>
<span class="n">REACTANT</span> <span class="n">WT</span><span class="o">.</span><span class="n">FRAC</span> <span class="p">(</span><span class="n">ENERGY</span><span class="o">/</span><span class="n">R</span><span class="p">),</span><span class="n">K</span> <span class="n">TEMP</span><span class="p">,</span><span class="n">K</span> <span class="n">DENSITY</span>
<span class="n">EXPLODED</span> <span class="n">FORMULA</span>
<span class="n">F</span><span class="p">:</span> <span class="n">H2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.000000</span> <span class="o">-</span><span class="mf">0.108393E+04</span> <span class="mf">20.27</span> <span class="mf">0.0000</span>
<span class="n">H</span> <span class="mf">2.00000</span>
<span class="n">O</span><span class="p">:</span> <span class="n">O2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.000000</span> <span class="o">-</span><span class="mf">0.156098E+04</span> <span class="mf">90.18</span> <span class="mf">0.0000</span>
<span class="n">O</span> <span class="mf">2.00000</span>
<span class="n">SPECIES</span> <span class="n">BEING</span> <span class="n">CONSIDERED</span> <span class="n">IN</span> <span class="n">THIS</span> <span class="n">SYSTEM</span>
<span class="p">(</span><span class="n">CONDENSED</span> <span class="n">PHASE</span> <span class="n">MAY</span> <span class="n">HAVE</span> <span class="n">NAME</span> <span class="n">LISTED</span> <span class="n">SEVERAL</span> <span class="n">TIMES</span><span class="p">)</span>
<span class="n">LAST</span> <span class="n">thermo</span><span class="o">.</span><span class="n">inp</span> <span class="n">UPDATE</span><span class="p">:</span> <span class="mi">9</span><span class="o">/</span><span class="mi">09</span><span class="o">/</span><span class="mi">04</span>
<span class="n">g</span> <span class="mi">6</span><span class="o">/</span><span class="mi">97</span> <span class="o">*</span><span class="n">H</span> <span class="n">g</span> <span class="mi">4</span><span class="o">/</span><span class="mi">02</span> <span class="n">HO2</span> <span class="n">tpis78</span> <span class="o">*</span><span class="n">H2</span>
<span class="n">g</span> <span class="mi">8</span><span class="o">/</span><span class="mi">89</span> <span class="n">H2O</span> <span class="n">g</span> <span class="mi">6</span><span class="o">/</span><span class="mi">99</span> <span class="n">H2O2</span> <span class="n">g</span> <span class="mi">5</span><span class="o">/</span><span class="mi">97</span> <span class="o">*</span><span class="n">O</span>
<span class="n">g</span> <span class="mi">4</span><span class="o">/</span><span class="mi">02</span> <span class="o">*</span><span class="n">OH</span> <span class="n">tpis89</span> <span class="o">*</span><span class="n">O2</span> <span class="n">g</span> <span class="mi">8</span><span class="o">/</span><span class="mi">01</span> <span class="n">O3</span>
<span class="n">g11</span><span class="o">/</span><span class="mi">99</span> <span class="n">H2O</span><span class="p">(</span><span class="n">cr</span><span class="p">)</span> <span class="n">g</span> <span class="mi">8</span><span class="o">/</span><span class="mi">01</span> <span class="n">H2O</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="n">g</span> <span class="mi">8</span><span class="o">/</span><span class="mi">01</span> <span class="n">H2O</span><span class="p">(</span><span class="n">L</span><span class="p">)</span>
<span class="n">O</span><span class="o">/</span><span class="n">F</span> <span class="o">=</span> <span class="mf">6.000000</span>
<span class="n">EFFECTIVE</span> <span class="n">FUEL</span> <span class="n">EFFECTIVE</span> <span class="n">OXIDANT</span> <span class="n">MIXTURE</span>
<span class="n">ENTHALPY</span> <span class="n">h</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="o">/</span><span class="n">R</span> <span class="n">h</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="o">/</span><span class="n">R</span> <span class="n">h0</span><span class="o">/</span><span class="n">R</span>
<span class="p">(</span><span class="n">KG</span><span class="o">-</span><span class="n">MOL</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span><span class="o">/</span><span class="n">KG</span> <span class="o">-</span><span class="mf">0.53769505E+03</span> <span class="o">-</span><span class="mf">0.48782395E+02</span> <span class="o">-</span><span class="mf">0.11862706E+03</span>
<span class="n">KG</span><span class="o">-</span><span class="n">FORM</span><span class="o">.</span><span class="n">WT</span><span class="o">./</span><span class="n">KG</span> <span class="n">bi</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> <span class="n">bi</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="n">b0i</span>
<span class="o">*</span><span class="n">H</span> <span class="mf">0.99212255E+00</span> <span class="mf">0.00000000E+00</span> <span class="mf">0.14173179E+00</span>
<span class="o">*</span><span class="n">O</span> <span class="mf">0.00000000E+00</span> <span class="mf">0.62502344E-01</span> <span class="mf">0.53573438E-01</span>
<span class="n">POINT</span> <span class="n">ITN</span> <span class="n">T</span> <span class="n">H</span> <span class="n">O</span>
<span class="mi">1</span> <span class="mi">9</span> <span class="mf">3483.350</span> <span class="o">-</span><span class="mf">9.273</span> <span class="o">-</span><span class="mf">16.160</span>
<span class="n">Pinf</span><span class="o">/</span><span class="n">Pt</span> <span class="o">=</span> <span class="mf">1.734909</span>
<span class="mi">2</span> <span class="mi">4</span> <span class="mf">3291.075</span> <span class="o">-</span><span class="mf">9.450</span> <span class="o">-</span><span class="mf">16.510</span>
<span class="n">Pinf</span><span class="o">/</span><span class="n">Pt</span> <span class="o">=</span> <span class="mf">1.735136</span>
<span class="mi">2</span> <span class="mi">1</span> <span class="mf">3291.030</span> <span class="o">-</span><span class="mf">9.450</span> <span class="o">-</span><span class="mf">16.510</span>
<span class="n">THEORETICAL</span> <span class="n">ROCKET</span> <span class="n">PERFORMANCE</span> <span class="n">ASSUMING</span> <span class="n">FROZEN</span> <span class="n">COMPOSITION</span>
<span class="n">AFTER</span> <span class="n">POINT</span> <span class="mi">2</span>
<span class="n">Pinj</span> <span class="o">=</span> <span class="mf">1000.0</span> <span class="n">PSIA</span>
<span class="n">CASE</span> <span class="o">=</span> <span class="n">LOX_</span><span class="o">/</span><span class="n">_LH2</span>
<span class="n">REACTANT</span> <span class="n">WT</span> <span class="n">FRACTION</span> <span class="n">ENERGY</span> <span class="n">TEMP</span>
<span class="p">(</span><span class="n">SEE</span> <span class="n">NOTE</span><span class="p">)</span> <span class="n">CAL</span><span class="o">/</span><span class="n">MOL</span> <span class="n">K</span>
<span class="n">FUEL</span> <span class="n">H2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.0000000</span> <span class="o">-</span><span class="mf">2154.000</span> <span class="mf">20.270</span>
<span class="n">OXIDANT</span> <span class="n">O2</span><span class="p">(</span><span class="n">L</span><span class="p">)</span> <span class="mf">1.0000000</span> <span class="o">-</span><span class="mf">3102.000</span> <span class="mf">90.180</span>
<span class="n">O</span><span class="o">/</span><span class="n">F</span><span class="o">=</span> <span class="mf">6.00000</span> <span class="o">%</span><span class="n">FUEL</span><span class="o">=</span> <span class="mf">14.285714</span> <span class="n">R</span><span class="p">,</span><span class="n">EQ</span><span class="o">.</span><span class="n">RATIO</span><span class="o">=</span> <span class="mf">1.322780</span> <span class="n">PHI</span><span class="p">,</span><span class="n">EQ</span><span class="o">.</span><span class="n">RATIO</span><span class="o">=</span> <span class="mf">1.322780</span>
<span class="n">CHAMBER</span> <span class="n">THROAT</span> <span class="n">EXIT</span>
<span class="n">Pinf</span><span class="o">/</span><span class="n">P</span> <span class="mf">1.0000</span> <span class="mf">1.7351</span> <span class="mf">539.53</span>
<span class="n">P</span><span class="p">,</span> <span class="n">ATM</span> <span class="mf">68.046</span> <span class="mf">39.216</span> <span class="mf">0.12612</span>
<span class="n">T</span><span class="p">,</span> <span class="n">K</span> <span class="mf">3483.35</span> <span class="mf">3291.03</span> <span class="mf">1149.39</span>
<span class="n">RHO</span><span class="p">,</span> <span class="n">G</span><span class="o">/</span><span class="n">CC</span> <span class="mf">3.2038</span><span class="o">-</span><span class="mi">3</span> <span class="mf">1.9758</span><span class="o">-</span><span class="mi">3</span> <span class="mf">1.8194</span><span class="o">-</span><span class="mi">5</span>
<span class="n">H</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">235.74</span> <span class="o">-</span><span class="mf">509.81</span> <span class="o">-</span><span class="mf">2255.83</span>
<span class="n">U</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">750.09</span> <span class="o">-</span><span class="mf">990.49</span> <span class="o">-</span><span class="mf">2423.71</span>
<span class="n">G</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="n">G</span> <span class="o">-</span><span class="mf">15090.3</span> <span class="o">-</span><span class="mf">14544.2</span> <span class="o">-</span><span class="mf">7157.33</span>
<span class="n">S</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span> <span class="mf">4.2644</span> <span class="mf">4.2644</span> <span class="mf">4.2644</span>
<span class="n">M</span><span class="p">,</span> <span class="p">(</span><span class="mi">1</span><span class="o">/</span><span class="n">n</span><span class="p">)</span> <span class="mf">13.458</span> <span class="mf">13.606</span> <span class="mf">13.606</span>
<span class="n">Cp</span><span class="p">,</span> <span class="n">CAL</span><span class="o">/</span><span class="p">(</span><span class="n">G</span><span class="p">)(</span><span class="n">K</span><span class="p">)</span> <span class="mf">2.0951</span> <span class="mf">1.9171</span> <span class="mf">0.6859</span>
<span class="n">GAMMAs</span> <span class="mf">1.1401</span> <span class="mf">1.1403</span> <span class="mf">1.2705</span>
<span class="n">SON</span> <span class="n">VEL</span><span class="p">,</span><span class="n">M</span><span class="o">/</span><span class="n">SEC</span> <span class="mf">1566.3</span> <span class="mf">1514.4</span> <span class="mf">944.7</span>
<span class="n">MACH</span> <span class="n">NUMBER</span> <span class="mf">0.000</span> <span class="mf">1.000</span> <span class="mf">4.352</span>
<span class="n">PERFORMANCE</span> <span class="n">PARAMETERS</span>
<span class="n">Ae</span><span class="o">/</span><span class="n">At</span> <span class="mf">1.00000</span> <span class="mf">40.000</span>
<span class="n">CSTAR</span><span class="p">,</span> <span class="n">FT</span><span class="o">/</span><span class="n">SEC</span> <span class="mf">7560.0</span> <span class="mf">7560.0</span>
<span class="n">CF</span> <span class="mf">0.6572</span> <span class="mf">1.7843</span>
<span class="n">Ivac</span><span class="p">,</span><span class="n">LB</span><span class="o">-</span><span class="n">SEC</span><span class="o">/</span><span class="n">LB</span> <span class="mf">289.8</span> <span class="mf">436.7</span>
<span class="n">Isp</span><span class="p">,</span> <span class="n">LB</span><span class="o">-</span><span class="n">SEC</span><span class="o">/</span><span class="n">LB</span> <span class="mf">154.4</span> <span class="mf">419.3</span>
<span class="n">MOLE</span> <span class="n">FRACTIONS</span>
<span class="o">*</span><span class="n">H</span> <span class="mf">0.02810</span> <span class="n">HO2</span> <span class="mf">0.00002</span> <span class="o">*</span><span class="n">H2</span> <span class="mf">0.24538</span>
<span class="n">H2O</span> <span class="mf">0.68751</span> <span class="n">H2O2</span> <span class="mf">0.00001</span> <span class="o">*</span><span class="n">O</span> <span class="mf">0.00217</span>
<span class="o">*</span><span class="n">OH</span> <span class="mf">0.03446</span> <span class="o">*</span><span class="n">O2</span> <span class="mf">0.00236</span>
<span class="o">*</span> <span class="n">THERMODYNAMIC</span> <span class="n">PROPERTIES</span> <span class="n">FITTED</span> <span class="n">TO</span> <span class="mf">20000.</span><span class="n">K</span>
<span class="n">PRODUCTS</span> <span class="n">WHICH</span> <span class="n">WERE</span> <span class="n">CONSIDERED</span> <span class="n">BUT</span> <span class="n">WHOSE</span>
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