A nozzle having a velocity coefficient of 0.98 discharges a jet 15 cm in diameter under a head of 270 m. The average nozzle angle is a, = 15°. The wheel diameter is 2.45 m, B2 = 20°.k = 0.5. The mechanical efficiency is 97%. The peripheral velocity of the wheel is designed for maximum efficiency

A nozzle having a velocity coefficient of 0.98 discharges a jet 15 cm in diameter under a head of 270 m. The average nozzle angle is a, = 15°. The wheel diameter is 2.45 m, B2 = 20°.k = 0.5. The mechanical efficiency is 97%. The peripheral velocity of the wheel is designed for maximum efficiency

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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Concept explainers

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.

Question

Fluid machinery

PROBLEM:
A nozzle having a velocity coefficient of 0.98 discharges a jet 15 cm in diameter
under a head of 270 m. The average nozzle angle is a, = 15° . The wheel diameter is
2.45 m, B2 = 20°.k = 0.5. The mechanical efficiency is 97%. The peripheral velocity
of the wheel is designed for maximum efficiency.
m/sec
h) Find for the Nozzle-Bucket efficiency, in per cent.
i) Solve for the Turbine Gross efficiency.
j) Draw a velocity diagram. And label.

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