An adiabatic diffuser receives oxygen at 15°F, 15 psia, and 900 ft/s. The oxygen exits at 10 ft/s and 20 psia. Assuming constant specific heats, (a) determine the entropy generation per kg of oxygen for the diffuser. (b) Plot the entropy generation per kg of oxygen for exit pressures ranging from 17 psia to 50 psia, with the same exit velocity. At what exit pressure is the operation of the diffuser impossible as described?
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