Hydro-machinery such as turbines and pumps represent fluid devices that have wide variety of configurations. Centrifugal pumps add energy to a fluid – by doing work on the fluid to move and increase the pressure. Figure 3 below shows the velocity diagram at the inlet and exit of a centrifugal pump im:peller pumping water at 6000 L/min and operating at 1750 rpm. The pump has a blade height, b, of 6cm with ri = 4cm and r2 = 16cm, with an exit blade angle B2 = 22°. Assume ideal flow conditions and that the tangentia! velocity component of the water entering the blade is zero. Analyze the pump in terms of tangential velocity component at the exit Vo2, the ideal head rise hi, and the power transferred to the fluid Wahafe

Hydro-machinery such as turbines and pumps represent fluid devices that have wide variety of configurations. Centrifugal pumps add energy to a fluid – by doing work on the fluid to move and increase the pressure. Figure 3 below shows the velocity diagram at the inlet and exit of a centrifugal pump im:peller pumping water at 6000 L/min and operating at 1750 rpm. The pump has a blade height, b, of 6cm with ri = 4cm and r2 = 16cm, with an exit blade angle B2 = 22°. Assume ideal flow conditions and that the tangentia! velocity component of the water entering the blade is zero. Analyze the pump in terms of tangential velocity component at the exit Vo2, the ideal head rise hi, and the power transferred to the fluid Wahafe

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

Problem 1(5): A centrifugal pump transports water between two reservoirs. The pump has an outer diameter of 15 cm, an inner diameter of 8 cm, and a blade width of 2 cm and operates at 1750 rpm. If the water enters the pump axially at ẞ₁ = 45º¸ compute the volume flow rate, Problem 2(10): In the pump of problem 1, the water exits at B₂ 65° when the pump is driven at 1750 rpm. = Compute the minimum power required by the pump?
The impeller of a centrifugal pump is 0.5 m in diameter and rotates at 1200 r .p. m . ; blades are curved back to an angle of 30⁰ to the tangent at outlet tip . If the measured velocity of flow at outlet is 5 m/ sec. If the pump is provided with whirlpool chamber which reduces the velocity of water by 50%. Kinetic energy converted into in whirlpool chamber in j/kg/sec And tangential velocity of runner at outlet
1 The internal and external diameters of the impeller of a centrifugal pump are 200 mm and 400 mm respectively. The pump is running at 1200 rpm. Forward blades make an angle of 150o at exit and at inlet the angle is 20o. The blade thicknesses at the inlet and outlet are 100mm and 70mm respectively. The hydraulic efficiency of the pump is 87%. Assume the water enters the impeller radially. i Draw neatly the outlet velocity diagram and the inlet velocity diagram. ii Find the Euler power of the pump. iii Find the net Head of the pump. Ans: (ii)140.65W; (iii) 43.42m
4. A centrifugal pump delivers water to a height of 22 metres at a speed of 800 r.p.m. The velocity of flow is constant at a speed of 2-0 m/s and the outlet vane anglc is 45°. If the pump discharges 225 litres of water per second, find the diameter of the impeller and width of the impcller at oudet. (Ans. 375 mm: 95 mm)
A centrifugal pump transports water between two reservoirs. The pump has an outer diameter of 15 cm, an inner diameter of 8 cm, and a blade width of 2 cm and operates at 1750 rpm. If the water enters the pump axially at ẞ₁ = 45°, compute the volume flow rate, In the pump of problem 1, the water exits at ẞ₂ = 65° when the pump is driven at 1750 rpm. Compute the minimum power required by the pump?
A single stage centrifugal pump has an impeller of 250 mm diameter which rotates at 1,800 rpm and lifts 60 lit/sec to 25 m with an efficiency of 70%. Obtain the number of stages and diameter of each impeller of a similar multi-stage pump to lift 75 lit/sec to 175 m at 1,500 rpm. (8 stages ; 280 mm dia)
An inward flow reaction turbine, having an inner and outer diameter of 0.45m and 0.90m, respectively. The vanes are radial at inlet and the discharge is radial at outlet and the water enters the vanes at an angle of 12°. Assuming the velocity of flow as constant and equal to 2.8m/s, find the speed of the wheel and the vane angle at outlet. Show schematic diagram and provide solutions.
H.W: The inlet diameter of the centrifugal pump, shown in figure below, is 28 in. and the outlet flow through the pump is 9200 lb/s. The density of the water is 49 lb/ft. What is the velocity at the pump inlet? Ib m = 9200 sec 28 in. = ? ------ --
H.W: The inlet diameter of the centrifugal pump, shown in figure below, is 28 in. and the outlet flow through the pump is 9200 lb/s. The density of the water is 49 lb/ft. What is the velocity at the pump inlet? Ib m = 9200 sec 28 in. V = ? --
4. A pump has a displacement volume of 6in³. It delivers 24gpm at 1000rpm and 1000psi. If the prime mover input torque is 1100in.lb, (a) What is the overall efficiency of the pump? (b) What is the theoretical torque required to operate the pump?
Q Consider the following data relating toperformance of a centrifugal pump:speed 1200 rpm, flow rate 30 L/s, head 20 m, and power 5 kW. If the speed of the pump is increased to 1500 rpm, assuming the efficiency isunaltered, Find the new flow rate and head.
A centrifugal pump impeller has an external diameter of 1.2 m and internal diameter of 0.8 m. The width of the impeller at outlet is 0.175 m and the blade angle at outlet is 65 degrees. The flow velocities at inlet and outlet are the same (Va1 = Va2). This pump delivers 1.55 m3/s of water at 210 rpm. For theoretical performance, calculate: 1-The flow velocity . 2-blade speed at outlet. 3-blade angle at inlet (in degrees). 4-the developed head. 5-The pressure rise across the impeller. 6-The number of blades . 7-The NPSH . %3D