Question: Determine the minimum possible diffuser contraction ratio and the power required for a two stage compressor to run a closed circuit supersonic tunnel at M=2.2.

Determine the minimum possible diffuser contraction ratio and the power required for a two stage compressor to run a closed circuit supersonic tunnel at M=2.2. The efficiency of the compressor is 85, poi = 4 atm, To = 330K, and ATS = 0.04m2 . Assume po2/po1=0.6281 and area ratio A1/A*= 1.005.

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