Kaplan Turbine

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Kaplan Turbine

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► Runner | Main dimensions

The Main Dimensions menu item is used to define main dimensions of the runner. Main Dimensions are forming the most important basis for all following design steps.

The real flow in a Kaplan turbine runner is turbulent and  three-dimensional. Secondary flows, separation and reattachment in boundary layers, transient recirculation areas and other features may occur. Nevertheless it is useful - and it is common practice in the turbine design theory - to simplify the realistic flow applying representative streamlines for the first design approach.

Employing 1D-streamline theory the following cross sections are significant in particular:

inlet (index 1)

outlet (index 2)


¢ Setup

¢ Parameters

¢ Dimensions

The design of the main dimensions has to be made in a strict order. This will be secured by the following: One step within the design has to be finished completely before the next can be accomplished. That is to say, the changeability of a tab sheet will be disabled by CFturbo until all necessary parameters have been specified.