A gas-turbine engine has an 8-stage axial flow compressor. Each stage has a pressure ratio of 1.24 and a polytropic efficiency of 87.2%. The compressor’s rated air flow is 30 lb/s. a. Calculate the...

A gas-turbine engine has an 8-stage axial flow compressor. Each stage has a pressure ratio of 1.24 and a polytropic efficiency of 87.2%. The compressor’s rated air flow is 30 lb/s. a. Calculate the overall pressure ratio of the compressor and its isentropic efficiency. b. The engine is rated with inlet air at 59◦F and 14.696 psia. Calculate the power consumed at rated conditions. c. The compressor is operated at a location where the inlet air conditions are 90◦F and 13.8 psia. Calculate the new values of mass flow and input power.