Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Delivers unit discharge under unit head
Develops unit power under unit head
Delivers unit discharge under unit speed
Develops unit power under unit speed

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Hydraulics and Fluid Mechanics in ME
In a forced vortex motion, the velocity of flow is

directly proportional to the square of its radial distance from the axis of rotation
inversely proportional to the square of its radial distance from the axis of rotation
inversely proportional to its radial distance from the axis of rotation
directly proportional to its radial distance from axis of rotation

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