1) Air with a density of 0.45 kg/m3 enters an experimental jet engine at a rate of 175 m/s. The inlet area of the engine is 7.0 ft2. After fuel is burned, the air and combustion byproducts leave the engine with a velocity of 695 m/s through an outlet area of 6.0 ft2. What is the average density of the gas exiting the engine? Express your answer in kg/m3, slugs/ft3, and lbm/ft3.
1) Air with a density of 0.45 kg/m3 enters an experimental jet engine at a rate of 175 m/s. The inlet area of the engine is 7.0 ft2. After fuel is burned, the air and combustion byproducts leave the engine with a velocity of 695 m/s through an outlet area of 6.0 ft2. What is the average density of the gas exiting the engine? Express your answer in kg/m3, slugs/ft3, and lbm/ft3.
2)
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Given data
the density of air () = 0.45 kg/m3
inlet velocity of air (Va) = 175 m/s
Inlet area (Ai) = 7 ft2 = 7*(0.3048)2 m2 { 1 ft = 0.3048 m }
= 0.65 m2
Outlet velocity (Vg) = 695 m/s
Outlet area (Ao) = 6 ft2 = 6*(0.3048)2 m2
= 0.557 m2
To determine
The average density of the gas exiting the engine
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