Gunner94

This question is off-topic, as in off-topic of cars. But since it's still an engine, I figure that you guys can help me out here. I am designing a micro-turbojet engine for a thrust of 250 N. My paper design has a maximum pressure ratio of about 2.7(it is limited by rotational speed of the compressor). Now could you suggest a fuel that can burn at this pressure ratio(air mass flow rate of 0.7 kg/s). It would be very helpful if you could tell me of a sparking technique that will help me sustain the flame during combustion, keeping in mind this low pressure ratio.

86LG4Bird

iTrader: (1)

I don't expect you will get much help here, but I'll suggest that with that incredibly low pressure (EPR of modern turbofans is more than 30:1), you want a fuel with a low flash point to make sure it ignites, and that would simply be gasoline.
Any type will do, but in the spirit of aviation, why not make it 100LL aviation fuel that you can get at general aviation airports. It would sound better in your paper than Speedway 87 octane

Gunner94

Thanks a ton!