Question: A jet engine at 7000-m altitude takes in 45 kg/s of air and adds 550 kJ/kg in the combustion chamber. The chamber cross section is

A jet engine at 7000-m 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°C. 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 7000-m altitude takes

45 kg/s 80 kPa 5 C Exit to atmos 550 kJ/kg

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