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Chapter Four

Laith Batarseh

Home

Nex

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Pre

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us

End

Impulse turbines-Pelton wheel

Hydro-turbines

Impulse Reaction

Energy extracted at the atmospheric pressure Pelton wheel is an example.

Energy extracted due to diffrence in pressure Frances turbine is an example.

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System description

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System description

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Theoretical analysis

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Kinetic energy of jet

Losses

In nozzle In bucket Residual kinetic energy

Miscellaneous losses

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Losses in nozzle

Losses in bucket

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Residual kinetic energy losses, HLe

Net head, H

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Overall power,P

Impulse turbines-Pelton wheel

Speed Ratio, Ku

0.43 < Ku< 0.47

Specific speed,Ns

8< Ns< 30

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Specific speed,Ns

Rotational speed,N

Impulse turbines-Pelton wheel

Specific Speed in Terms of Defined Ratios

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Coefficient of Velocity of the Nozzle, Cv

0.98< Cv< 0.99

Jet Ratio, m

7< m< 26

Also

Impulse turbines-Pelton wheel

4.2.2Basic theory of Pelton Wheel

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4.2.2Basic theory of Pelton Wheel

Impulse turbines-Pelton wheel

Velocity triangles

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Governing equations

Force

Torque

Power

Head

Hydraulic efficiency

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Other equations

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Impulse turbines-Pelton wheel

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