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6-35E A fan with 24-in-diameter blades moves 2000 cfm (cubic feet per minute) of air at 70°F at sea level. Determine (a) the force required to hold the fan and (b) the minimum power input required for the fan. Choose a control volume sufficiently large to contain the fan, with the inlet sufficiently far upstream so that the gage pressure at the inlet is nearly tero. Assume air approaches the fan through a large area with egligible velocity and air exits the fan with a uniform veloc- yat atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter. Answers: (a) 0.820 of, (b) 5.91 W

6-35E A fan with 24-in-diameter blades moves 2000 cfm (cubic feet per minute) of air at 70°F at sea level. Determine (a) the force required to hold the fan and (b) the minimum power input required for the fan. Choose a control volume sufficiently large to contain the fan, with the inlet sufficiently far upstream so that the gage pressure at the inlet is nearly tero. Assume air approaches the fan through a large area with egligible velocity and air exits the fan with a uniform veloc- yat atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter. Answers: (a) 0.820 of, (b) 5.91 W

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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6-35E A fan with 24-in-diameter blades moves 2000 cfm (cubic feet per minute) of air at 70°F at sea level. Determine (a) the force required to hold the fan and (b) the minimum power input required for the fan. Choose a control volume sufficiently large to contain the fan, with the inlet sufficiently far upstream so that the gage pressure at the inlet is nearly tero. Assume air approaches the fan through a large area with egligible velocity and air exits the fan with a uniform veloc- yat atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter. Answers: (a) 0.820 of, (b) 5.91 W f
Transcribed Image Text:6-35E A fan with 24-in-diameter blades moves 2000 cfm (cubic feet per minute) of air at 70°F at sea level. Determine (a) the force required to hold the fan and (b) the minimum power input required for the fan. Choose a control volume sufficiently large to contain the fan, with the inlet sufficiently far upstream so that the gage pressure at the inlet is nearly tero. Assume air approaches the fan through a large area with egligible velocity and air exits the fan with a uniform veloc- yat atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter. Answers: (a) 0.820 of, (b) 5.91 W f
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