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Converging nozzle. Air at 145 psia and 1100 F enters a converging nozzle with a velocity of 492 ft/s (335 mph). Determine the mass flow rate through the nozzle with a throat area of 7.7 in 2 when the back is a) 100 psia , b) 58 psia. Solution:. Assumptions:

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Converging nozzle

Air at 145 psia and 1100 F enters a converging nozzle with a velocity of 492 ft/s (335 mph). Determine the mass flow rate through the nozzle with a throat area of 7.7 in2 when the back is a) 100 psia, b) 58 psia


Solution:

Assumptions:

Air is ideal gas with constant specific heats at room temperature

2) Flow through nozzle is steady, 1-D, isentropic

Properties:

Cp = 0.2404 BTU/lbm∙R = 6019 ft2/s2∙R

2) γ = 1.4


Converging nozzle

Air enters a duct with a varying flow area at T1 = 261 °F and p1 = 14.51 psia, and M1 = 0.3. Assuming steady isentropic flow, determine T2, p2, and M2 at a location where the flow area has been reduced by 20%.


Solution:

Assumptions:

Air is ideal gas with constant specific heats at room temperature

2) Flow through nozzle is steady, 1-D, isentropic

Properties:

Cp = 0.2404 BTU/lbm∙R = 6019 ft2/s2∙R

2) γ = 1.4


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