applications/utilities/thermophysical/adiabaticFlameT/adiabaticFlameT.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2008 OpenCFD Ltd.
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM is free software; you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM; if not, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 Application
  26     adiabaticFlameT
  27
  28 Description
  29     Calculates the adiabatic flame temperature for a given fuel over a
  30     range of unburnt temperatures and equivalence ratios.
  31
  32 \*---------------------------------------------------------------------------*/
  33
  34 #include "argList.H"
  35 #include "Time.H"
  36 #include "dictionary.H"
  37 #include "IFstream.H"
  38 #include "OSspecific.H"
  39
  40 #include "specieThermo.H"
  41 #include "janafThermo.H"
  42 #include "perfectGas.H"
  43
  44 using namespace Foam;
  45
  46 typedef specieThermo<janafThermo<perfectGas> > thermo;
  47
  48
  49 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  50
  51 int main(int argc, char *argv[])
  52 {
  53     argList::validArgs.clear();
  54     argList::validArgs.append("controlFile");
  55     argList args(argc, argv);
  56
  57     fileName controlFileName(args.additionalArgs()[0]);
  58
  59     // Construct control dictionary
  60     IFstream controlFile(controlFileName);
  61
  62     // Check controlFile stream is OK
  63     if (!controlFile.good())
  64     {
  65         FatalErrorIn(args.executable())
  66             << "Cannot read file " << controlFileName
  67             << exit(FatalError);
  68     }
  69
  70     dictionary control(controlFile);
  71
  72
  73     scalar T0(readScalar(control.lookup("T0")));
  74     word fuelName(control.lookup("fuel"));
  75     scalar n(readScalar(control.lookup("n")));
  76     scalar m(readScalar(control.lookup("m")));
  77
  78
  79     Info<< nl << "Reading Burcat data dictionary" << endl;
  80
  81     fileName BurcatCpDataFileName(dotFoam("thermoData/BurcatCpData"));
  82
  83     // Construct control dictionary
  84     IFstream BurcatCpDataFile(BurcatCpDataFileName);
  85
  86     // Check BurcatCpData stream is OK
  87     if (!BurcatCpDataFile.good())
  88     {
  89         FatalErrorIn(args.executable())
  90             << "Cannot read file " << BurcatCpDataFileName
  91             << exit(FatalError);
  92     }
  93
  94     dictionary CpData(BurcatCpDataFile);
  95
  96
  97     scalar stoicO2 = n + m/4.0;
  98     scalar stoicN2 = (0.79/0.21)*(n + m/4.0);
  99     scalar stoicCO2 = n;
 100     scalar stoicH2O = m/2.0;
 101
 102     thermo fuel
 103     (
 104         "fuel",
 105         thermo(CpData.lookup(fuelName))
 106     );
 107
 108     thermo oxidant
 109     (
 110         "oxidant",
 111         stoicO2*thermo(CpData.lookup("O2"))
 112       + stoicN2*thermo(CpData.lookup("N2"))
 113     );
 114
 115     dimensionedScalar stoichiometricAirFuelMassRatio
 116     (
 117         "stoichiometricAirFuelMassRatio",
 118         dimless,
 119         (oxidant.W()*oxidant.nMoles())/fuel.W()
 120     );
 121
 122     Info<< "stoichiometricAirFuelMassRatio "
 123         << stoichiometricAirFuelMassRatio << ';' << endl;
 124
 125     for (int i=0; i<300; i++)
 126     {
 127         scalar equiv = (i + 1)*0.01;
 128         scalar ft = 1/(1 + stoichiometricAirFuelMassRatio.value()/equiv);
 129
 130         Info<< "phi = " << equiv << nl
 131             << "ft = " << ft << endl;
 132
 133         scalar o2 = (1.0/equiv)*stoicO2;
 134         scalar n2 = (0.79/0.21)*o2;
 135         scalar fres = max(1.0 - 1.0/equiv, 0.0);
 136         scalar ores = max(1.0/equiv - 1.0, 0.0);
 137         scalar fburnt = 1.0 - fres;
 138
 139         thermo fuel
 140         (
 141             "fuel",
 142             thermo(CpData.lookup(fuelName))
 143         );
 144         Info<< "fuel " << fuel << ';' << endl;
 145
 146         thermo oxidant
 147         (
 148             "oxidant",
 149             o2*thermo(CpData.lookup("O2"))
 150           + n2*thermo(CpData.lookup("N2"))
 151         );
 152         Info<< "oxidant " << (1/oxidant.nMoles())*oxidant << ';' << endl;
 153
 154         thermo reactants
 155         (
 156             "reactants",
 157             fuel + oxidant
 158         );
 159         Info<< "reactants " << (1/reactants.nMoles())*reactants << ';' << endl;
 160
 161         thermo burntProducts
 162         (
 163             "burntProducts",
 164           + (n2 - (0.79/0.21)*ores*stoicO2)*thermo(CpData.lookup("N2"))
 165           + fburnt*stoicCO2*thermo(CpData.lookup("CO2"))
 166           + fburnt*stoicH2O*thermo(CpData.lookup("H2O"))
 167         );
 168         Info<< "burntProducts "
 169             << (1/burntProducts.nMoles())*burntProducts << ';' << endl;
 170
 171         thermo products
 172         (
 173             "products",
 174             fres*fuel
 175           + n2*thermo(CpData.lookup("N2"))
 176           + fburnt*stoicCO2*thermo(CpData.lookup("CO2"))
 177           + fburnt*stoicH2O*thermo(CpData.lookup("H2O"))
 178           + ores*stoicO2*thermo(CpData.lookup("O2"))
 179         );
 180
 181         Info<< "products " << (1/products.nMoles())*products << ';' << endl;
 182
 183         scalar Tad = products.TH(reactants.H(T0), 1000.0);
 184         Info<< "Tad = " << Tad << nl << endl;
 185     }
 186
 187     Info<< nl << "end" << endl;
 188
 189     return(0);
 190 }
 191
 192
 193 // ************************************************************************* //