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I have been trying for literally days on this problem and its completley done me in.

The problem is as follows.

I have to evaluate a jet engine using the SFEE equation.

So far I have concluded that this equation will be the best to use...

Qr – Wrx = ṁ Δ [ h + ½ Ṽ2].

Although my problem is I only have the following data available to me...

"h0e/he ratio of total-to-static enthalpy at exit from the engine

h1 J/kg enthalpy at entry to the engine

Ṽ1 m/s airspeed at entry to the engine

ṁ engine air mass flow rate, kg/s

κ fraction of fuel energy input lost to the atmosphere

Pe static pressure the engine exit, kPa

You should assume Cp/R for the exhaust gases to be 4.33, and take the calorific value of the fuel to be 43 MJ/kg."

and I cannot work out for the life of me how to do it.

I really hope someone on here can help.

Thanks..

Daniel.

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# Steady Flow Energy Equation Problem.

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