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4. A bladed fan rotor with an outside diameter of 12 in. and a 5 in. inside diameter runs at 1725 rpm. The width of each rotor blade is 1 in., from the blade inlet to outlet. The volume flow rate is steady at 230 ft/min. and the absolute velocity of the air at the blade inlet is purely radial, V₁. The blade discharge angle at the outlet is 30° as shown. (a) What would be a reasonable blade inlet angle, and (b) what is the power required to run the fan. (Pair = 2.38 × 10-3slugs ft3 309 1725 rpm 12 in. Q-230 ft/min

4. A bladed fan rotor with an outside diameter of 12 in. and a 5 in. inside diameter runs at 1725 rpm. The width of each rotor blade is 1 in., from the blade inlet to outlet. The volume flow rate is steady at 230 ft/min. and the absolute velocity of the air at the blade inlet is purely radial, V₁. The blade discharge angle at the outlet is 30° as shown. (a) What would be a reasonable blade inlet angle, and (b) what is the power required to run the fan. (Pair = 2.38 × 10-3slugs ft3 309 1725 rpm 12 in. Q-230 ft/min

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
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4. A bladed fan rotor with an outside diameter of 12 in. and a 5 in. inside diameter runs at 1725 rpm. The width of each rotor blade is 1 in., from the blade inlet to outlet. The volume flow rate is steady at 230 ft/min. and the absolute velocity of the air at the blade inlet is purely radial, V₁. The blade discharge angle at the outlet is 30° as shown. (a) What would be a reasonable blade inlet angle, and (b) what is the power required to run the fan. (Pair = 2.38 × 10-3slugs ft3 309 1725 rpm 12 in. Q-230 ft/min
Transcribed Image Text:4. A bladed fan rotor with an outside diameter of 12 in. and a 5 in. inside diameter runs at 1725 rpm. The width of each rotor blade is 1 in., from the blade inlet to outlet. The volume flow rate is steady at 230 ft/min. and the absolute velocity of the air at the blade inlet is purely radial, V₁. The blade discharge angle at the outlet is 30° as shown. (a) What would be a reasonable blade inlet angle, and (b) what is the power required to run the fan. (Pair = 2.38 × 10-3slugs ft3 309 1725 rpm 12 in. Q-230 ft/min
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