The external and internal diameters ofthe impeller of a centrifugal pump are 0.3m and 0.15 m respectively. The rotationalspeed of the pump is 1200 rpm andthe vanes make an angle of 28° withthe peripheral velocity direction at theoutlet. The velocity of the flow throughthe impeller is constant at 1.7 m/s.Assuming the manometric efficiency of82%, find the vane angle at the inlet (°).18:19 /

Answered: Image /qna-images/answer/1e26a882-3090-4a40-b354-a8916aed3359.jpg

Answered: ce an angle of 28° velocity direction

Engineering

Mechanical Engineering

ce an angle of 28° velocity direction

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 centrifugal pump has an impeller of diameter 250 mm whose width at the exit is 50 mm. The flow velocity through the impeller having radial vanes is constant at 3.0 m/s. The speed of the pump is 1200 rpm and manometric efficiency is 85%. Find discharge (litres/ s) 18:21 /
A centrifugal pump having an impeller of diameter 500 mm delivers 140 litres of water per sccond. The velocity of flow is 1 m/s and the vanes are curved back at outlet at 30° to the wheel tangent. If the impeller speed is 400 r.p.m., find the power to drive the pump. (Ans. 12-9 kW) 3.
A francis turbine is having a inlet diameter of 2.0 m and an outlet diameter of 1.2 m. Thebreath of the blade is constant as 0.2 m. The runner rotates at a speed of 250 rpm with adischarge of 8 m3/sec. The vanes are radial at the inlet and the discharge is radially outwards atthe outlet. Calculate the angle of guide vane at the inlet and blade angle at the outlet.
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
Pumps: A centrifugal pump having 4 stages in parallel, delivers 18 kiloliters/min of liquid against a head of 25 m. The diameter of the impellers being 24 cm and the speed of 1800 rpm. A pump is to be made up with a number of stages in series of similar construction to that of the first pump to run at 1250 rpm and to deliver 15 kiloliters/min against a totalhead of 250 m. Find the diameter of the impellers and the number of stages required in this case. Answer: D = 46.63 cm, n = 6 stages
A centrifugal pump running at 1200 r.p.m. delivers water. The diameter of the impeller at the inlet is 100 mm and at the outlet is 300 mm. The width of the impeller is 50 mm at inlet and 20 mm at the outlet. The blade angle at the outlet is 30 degrees If the velocity of flow at the inlet is 2.2 m/s find the velocity of flow at the outlet. Also find the head developed if the manometric efficiency is 75%.
This course EHide block A centrifugal pump with the following impeller dimensions is used to pump water. The pump is running at 1000 rpm. The ideal head rise through the pump is 190 ft. b2 Poz 72 by The parameters of the impeller are as follows: r2= 9in, b2=3in, B2= 31° Take g= 9.81 m/s23 32.2 ft/s2 pw = 998 kg/m3 = 1.94 Slug/ft. Determine the theoretical flow rate in gpm Choose.. Determine the theoretical Power shaft in (hP) Choose...
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 large centrifugal pump has a 254 mm diameter inlet and a 127 mm diameter outlet pipe. Themeasured flow rate is 51.6 Liter per second of cold water. The measured inlet pressure is 127 mmHg above atmospheric and discharge pressure measured at a point 1.22 m above the pump outletis 212 kPa absolute. The pump input is 10 Hp. Find the pump efficiency
A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate: a) the pump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.
Q2/ An outward flow reaction turbine has tangential velocity at its inner rim as 20 m/s, and ratio of radii is 0.9. The turbine is placed 1 m below the water surface and blade angle are 90° and 20° at inlet and outlet respectively. The radial velocity of flow at inlet is 6 m/s. Neglecting frictional losses and taking the discharge as radial, draw velocity triangles at inlet and outlet and find: (a) guide vane angle (b) the velocity of water from the guides. (c) total head of water (d) hydraulic efficiency
1- A double jet of Pelton turbine driven by double nozzles to produce (4250 kw) to the shaft of an electrical generator when running at (400 rpm). The height of (180 m). wheel diameter is (1450 mm). The velocity of relative= 0.9 of jet velocity. If the angle of bucket is (165'), determine: a) Hydraulic efficiency b) Diameter of the jet