Engineering
Fluid Mechanics
Air in a room at T 0 = 290 K

Air in a room at T 0 = 290 K and P 0 = 90 kPa is to be drawn

Question:

Air in a room at T₀ = 290 K and P₀ = 90 kPa is to be drawn by a vacuum pump through a 3-cm-diameter, 2-m-long adiabatic tube equipped with a converging nozzle at the inlet. The flow in the nozzle section can be approximated as isentropic. The static pressure is measured to be 87 kPa at the tube inlet and 55 kPa at the tube exit. Determine the mass flow rate of air through the duct, the air velocity at the duct exit, and the average friction factor for the duct.

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To determine the mass flow rate of air through the duct the air velocity at the duct exit and the average friction factor for the duct we can use principles of fluid mechanics and thermodynamics We ll …View the full answer

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