A jet engine at 7000m altitude takes in 45 kg/s of air and adds 550 kJ/kg in the combustion chamber. The chamber cross section is 0.5 m2 and the air enters the chamber at 80 kPa and 5oC. After combustion the air expands through an isentropic converging nozzle to exit at atmospheric pressure. Estimate (a) the nozzle throat diameter (b) the nozzle exit velocity and (c) the thrust produced by the engine.

A jet engine at 7000m altitude takes in 45 kg/s of air and adds 550 kJ/kg in the combustion chamber. The chamber cross section is 0.5 m² and the air enters the chamber at 80 kPa and 5^oC. After combustion the air expands through an isentropic converging nozzle to exit at atmospheric pressure. Estimate (a) the nozzle throat diameter (b) the nozzle exit velocity and (c) the thrust produced by the engine.