Add n-Dodecane to combustion chamber component

Hi!

I’m trying to model an aviation jet-prop, which uses Jet A-1 fuel, using TESPy.

Using n-Dodecane C12H26 instead of Jet A should be good enough, and it’s included in CoolProp, however the combustion chamber component does not support it.

I’ve tried to add it myself, by adding it to the list of allowable fuels in combustion_chamber.setup_reaction_parameters, and adding the enthalpy of formation hf['Dodecane'] = -352.1 to combustion_chamber.calc_lhv. The LHV calculation was pretty good, got ~44 MJ/kg.

When running a simple model with source --> compressor --> combustion chamber --> sink, the calculation can’t seem to converge, no matter the starting conditions, so I guess I’m missing something else (the same model works with CH4 just fine).

What else is missing that will enable me to use this fuel in the model?

[IdoMarzel]

That’s amazing, thanks!

re: energy balance, I did not check it yet. I have some preliminary calculations, and they give results in the same area as the model’s results ±15 °C, but they’re not very accurate either so I can’t tell which is right. It’s in the ballpark, though.

The fuel is likely coming in hotter than that, I just used 15 °C as a starting point to see if the model works at all, following the combined cycle example.

[fwitte]

Hi, I added the fuel with gaseous reference state for now. Updated version of TESPy will go live later today. Best regards Francesco