8. (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 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 veloc- ity and air exits the fan with a uniform velocity at atmos- pheric pressure through an imaginary cylinder whose diame- ter is the fan blade diameter. A fan with 24-in-diameter blades moves 2000 cfm 2000 cfm Fan 2 24 in

8. (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 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 veloc- ity and air exits the fan with a uniform velocity at atmos- pheric pressure through an imaginary cylinder whose diame- ter is the fan blade diameter. A fan with 24-in-diameter blades moves 2000 cfm 2000 cfm Fan 2 24 in

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

See similar textbooks

Similar questions

A hydroelectric power plant uses Pelton-type turbines, in which multiple nozzles are used to accelerate the waterwhich is directed onto the turbine blades, which are exposed to an atmospheric pressure of 101.325 kPa. The water enters the nozzles with an absolute pressure of 500 kPa and a speed of 5 m/s, and the nozzle outlets are exposed to atmospheric pressure and have an internal diameter of 5 cm. Consider that the specific mass of water is 1,000 kg/m3. Determine the mass flow rate of water through each of the nozzles, and explain why the actual mass flow rate will be lower.
Air fills a 2-m-diameter balloon at 20ºC and 5 kPa gage. Additional air is forced into the balloon until it reaches 8 m in diameter at a gage pressure of 8 kPa, while the temperature remains constant. The added mass is nearest:
.........TheGaugePressure 0f the air in an aut0m0bile tire is 25psi, and assuming the ambient atm0sphericPressure is38psi. Express the_abs0lute_pressure_in the tire in bars.
The pressure-density relation for ethanol is approximatedby Eq. with B =1600 and n = 7. Use this relation toestimate the speed of the sound of ethanol at 2000 atmospheres.
Air at 20oC (density = 1.204 kg/m3) flows towards a rotating cylinder of diameter 1.50 m. If the velocity of the air is 100 km/h and the cylinder rotates clockwise at 220 rpm, determine (c) the maximum velocity of the air around the rotor, and (d) the pressure coefficient at the location corresponding to the maximum velocity.
A fan running at 1480 rpm takes in 6 m^3/min of air at inlet conditions of P_1=950 mbar and T_1=15^0 C. If the fan impeller dimeter is 40 cm and the table tip air angle 20^0, determine the total pressure developed by the fan and the impeller width at exit. Take the radial velocity at the exit as 0.2 times the impeller tip speed. State the assumptions used.
Air is flowing through a venture-meter whose diameter is 2.6 in at the entrance part (location 1) and 1.8 in at the throat (location 2). The gage pressure is measured to be 12.2 psia at the entrance and 11.8 psia at the throat. Neglecting frictional effects, show that the volume flow rate can be expressed as and determine the flow rate of air. Take the air density to be 0.075 lbm/ft3.
Water from a reservoir is raised in a vertical tube of internal diameter D = 30 cm under the influence of the pulling force F of a piston. Determine the force needed to raise the water to a height of h = 1.5 m above the free surface. What would your response be for h = 3 m? Also, taking the atmospheric pressure to be 96 kPa, plot the absolute water pressure at the piston face as h varies from 0 to 3 m.
The water is supplied at a pressure of 15 N/cm? to an accumulator, having a ram of diameter 2.0 m. If the total lift of the ram is 10 m, determine: (a) the capacity of the accumulator, and (b) total weight placed on the ram (including the weight of the ram). [Ans. (a) 4712.4 kNm, (b) 471240 N]
An airplane with a 1.8m diameter propeller travels in still air with a density of 1.14 kg/m3 at 85m/s. is doing. The speed of the air passing through the propeller is 115 m/s relative to the plane. a) the thrust on the aircraft, b) theoretical horsepower required to turn the propeller, c) propeller efficiency, and d) across the blade Determine the pressure difference.
A 20 cm diameter pipe carries air at 24 m / s at a pressure of 148 kpa absolute pressure and 27 ° C. What is the mass flow rate of air? the 20 cm pipe is reduced to 10 cm and the temperature and pressure are 11 ° C and 130.5 kpa. Determine the velocity in the 10cm pipe and the volume flow in both pipes
Apply the conservation of mass principle to various systems including steady- and unsteadyflow control volumes.