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Air modeled as an ideal gas enters a combustion chamber at
Chapter 4, Problem 4.4(choose chapter or problem)
Air modeled as an ideal gas enters a combustion chamber at \(20 \mathrm{lbf} / \mathrm{in}^{2}\) and \(70^{\circ} \mathrm{F}\) through a rectangular duct, 5 ft by 4 ft. If the mass flow rate of the air is 830,000 lb/h, determine the velocity, in ft/s.
Questions & Answers
QUESTION:
Air modeled as an ideal gas enters a combustion chamber at \(20 \mathrm{lbf} / \mathrm{in}^{2}\) and \(70^{\circ} \mathrm{F}\) through a rectangular duct, 5 ft by 4 ft. If the mass flow rate of the air is 830,000 lb/h, determine the velocity, in ft/s.
ANSWER:Step 1 of 3
KNOWN: Pressure, temperature, and mass flow rate of air entering a combustion chamber through a 
We need to determine Velocity, in 
Schematic can be drawn as below.
We assume that
1. Flow is one-dimensional.
2. Air is modeled as an ideal gas.