11:-7The impeller of a centrifugal pump is 0.5 min diameter and rotates at 1200 r .p. m.;blades are curved back to an angle of 30°to the tangent at outlet tip. If the measuredvelocity of flow at outlet is 5 m/ sec. If thepump is provided with whirlpool chamberwhich reduces the velocity of water by50%.Tangential velocity of runner at outletهذا هو جوابكالجواب -11) The peripheral speed at impeller outletTx0.5x1200= 31.4m/s%3D60V2 = 5m/s (given)Work input per unit weight ofVw2 U2 - (31.4-5cot 30°)x 31.4Water =9.81=72.78mUnder ideal condition (without loss), the total head developed by the pump = 72.78 mAbsolute velocity of water at the outletV2 = (31.4-5cot 30)2 +52=23.28 m/sAt the whirlpool chamber,The velocity of water at delivery = 0.5 23.28m/sTherefore the pressure head at impeller outlet(0.5x23.28)2=72.78 -2x9.81= 65.87mHence, we theoretical maximum lift = 65.87mII

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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 30° 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%.Tangential velocity of runner at 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 30° 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%.Tangential velocity of runner at outlet

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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