Properties of gas mixture after combustion

[Aldo Moschetti]

Hi there,

I need an hand with my code.

I'm using cantera-matlab and I used this lines to define what happens to my gas mixture in

my combustion chamber and, after this, I took all the thermodynamic properties that I needed.

I used this because I needed only the thermodynamic properties at the equilibrium:

c5_gas = Solution('Z79_C5.yaml');

set(c5_gas,'T',Tt_i,'P',Pt_i,'Y',['O2:',num2str(yo2),',POSF12345:',num2str(yf),',N2:',num2str(yn2)]);

equilibrate(c5_gas,'UV');

c5_gas()

Now I need to know what's happens to my gas mixture after this stage. I need to know the same thermodynamic properties after the gas passes through a turbine after the combustion chamber, so I need to change temperature and pressure but to mantain constant the mixture composition, because there's no other combustions. Any ideas on how can I make this?

I know that meaby is a dumb question, but I'm struggling with this.

Thank you for your precious time.

Aldo