Question: Air enters a diffuser at 2 7 C and 1 0 0 kPa . The approach velocity is 3 3 3 m / s .

Air enters a diffuser at 27 C and 100 kPa . The approach velocity is 333 m / s . Assume the flow process to be isentropic . If the air velocity leaving the diffuser is 67 m / s , calculate the entrance and exit Mach numbers , the exit static pressure and the percentage change in cross- sectional area between entrance and exit sections . Does the area increase or decrease?

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