Fuel flow variation with change in ambient air temp
Situation: You have air at +20 degrees C entering your turboprop engine and with the current settings you are producing 75% torque - fuel flow is 500 lb/hr.
If you change the ambient air temp to -30 degrees C and adjust the power lever to maintain 75% torque, will the fuel flow be 500 lb/hr?
The engine is direct-drive and the RPM is at 100% and does not get adjusted.
I'd also be interested in what happens in a free-turbine or turbojet/fan where the spool speed is allowed to change.
Cheers!