Why turbomachine such as gas turbine considered adiabatic when heat is injected for combustion???
It is not realy adiabatic, but you may assume it as adiabatic. Please make a test with a small centrifugal pump and a centrifugal blower. Make the measurement and calculate the effect of heat loss against the total power input. I hope you will have a good real justification about the adiabatic assumption for the turbomachine.....
Dear Kamal,
the adiabaticity of turbomachinery is an assumption justified by the fact that heat losses in such machines are negligible with respect to the enthalpy variation experienced by the fluid passing through them.
The turbine itself is considered adiabatic, but not the same for the combustion chamber, where obviously it is heat added by combustion.
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