Question: A wind-tunnel test section is 3 ft square with flow properties V = 150 ft/s, p = 15 lbf/in2 absolute, and T = 68F. Boundary-layer

A wind-tunnel test section is 3 ft square with flow properties V = 150 ft/s, p = 15 lbf/in2 absolute, and T = 68°F. Boundary-layer blockage at the end of the test section is 8 percent. Find the angle, length, exit height, and exit pressure of a flat-walled diffuser added onto the section to achieve maximum pressure recovery.

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