A slip factor calculation in centrifugal impellers based on linear ...

Abstract
Accurate model<strong>in</strong>g of the flow <strong>slip</strong> aga<strong>in</strong>st direction
of rotation is essential for correct prediction of the
<strong>centrifugal</strong> impeller performance. The process is
characterized by a <strong>slip</strong> <strong>factor</strong>. Most correlations
available for <strong>calculation</strong> of the <strong>slip</strong> <strong>factor</strong> use
parameters characteriz<strong>in</strong>g basic impeller geometry
(review of Wiesner (1967) and Backstrom (2006)).
Approach presented below is <strong>based</strong> on reduction of
radial cascade to equivalent l<strong>in</strong>ear cascade. The
reduction allows to calculate characteristics of
radial blade row us<strong>in</strong>g well established
experimental data obta<strong>in</strong>ed for l<strong>in</strong>ear cascades,
diffusers and axial blade rows.
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