Secondary Flows in Radial Diffusing Channels

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An approximate method has been developed for the estimation of the secondary flow through a radial diffusing cascade. The basis of this numerical treatment is on the Reynolds Navier Stokes method.The theoretical development is based on the channel approach, in that the flow emerging out of the channel is assumed to consist of two sets of symmetrical vortices, which includes the shroud cross flow principle. The flow is considered to be ir-rotational and incompressible. This however is a bad approximation for high pressure recovery diffusers. The solution could be extended to compressible situations – approximate solutions only.

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126-132

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December 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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