a fan with a 48 in diameter blades moves air at 70 degrees F at sea level. The f

Question

a fan with a 48 in diameter blades moves air at 70 degrees F at sea level. The fan requires 2.5 lbf to hold it in place. Determine the volume flow rate of air through the fan in ft3/s and the minimum power in hp required for the fan. Choose the control volume sufficiently large to contain the fan, and the gage pressure and the air velocity on the inlet side to be zero. Assume air approaches the fan through a large area with negligible velocity and air exits the fan with a uniform velocity at atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter

Explanation / Answer

http://highered.mcgraw-hill.com/sites/dl/free/0070611971/373965/Errata_for_Chapter_06.pdf

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