How to change gas characteristics in dp_C3P ?

[Fabien852]

Hello,

I wish to use another kind of gas in my study.
In the file dp_C3P, i understand how works the lines :
- Especes Gazeuses
- Composition CHON
- Composition en especes elementaires

But i don't know how to change this line :
1 Nb de reactions mises en jeu pour les especes globales/stoechiometrie en nb de mole especes globales
1 2 -1. -23.80 25.80

I understood that 25.8 was the sum of product mol number (3+4+18.8) but not the rest.

Afterwards, i didn't understood the line "Nb de points de tabulation ENTH-TEMP".

Someone can help me ?


Best regards,


Fabien

[Bertrand Sapa]

Hello Fabien,

on this line : 1 2 -1. -23.80 25.80
the two first number are the reactants (1 fuel, 2 oxidizer), and the last terms are the number of moles of each reactant involved in the reaction

for the reaction C3H8 + 5 (02+3.76N2) -> 3 CO2 + 4 H20 + 5*3.76 N2

-1, one mole of fuel
-23.80, oxidizer mole number ( 5*(1+3.76) )
25.80, products mole number ( 3 + 4 + 5*3.76 )

"Nb de points de tabulation ENTH-TEMP" is the number of discrete points used to create the conversion table between enthalpy and temperature thanks to JANAF polynomials.

Best regards,
Bertrand