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I am writing a report designing a propulsion system, ie a turbine to power an apu, and have various requirements such as a power demand for the apu of 400kW so the turbo-jet needs to have 421.05kN of power. i have various other information regarding the effiency's of the turbine.

I believe the 1st thing i need to work out is the engine inlet area, but am having trouble finding an equation which would help me work this out. I do not have a value for mass flow rate which is the next thing i believe i will need to work out but am not sure how to work out in the inlet area A with out the mass flow rate!

Can any one suggest some equations which might help or know of any useful websites or books on the subject!

many thanks, happy new year

Rob

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# Propulsion system

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