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Note on the Speed of Stall Propagation in a Cascade of Aerofoils

Published online by Cambridge University Press:  07 June 2016

F. Cheers  and
G. C. Funnell
F. Cheers
Affiliation:
University of Manchester
G. C. Funnell
Affiliation:
University of Manchester
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Summary

From an investigation of published experimental results, it appears that three types of propagating stall cells occur on isolated blade rows. On stationary blade rows, and rotating rows which have the highest blade incidence at the tip, the speed of propagation seems to depend on a parameter based on the blade section near the leading edge, and in some experiments marked changes in this speed have been observed to coincide with changes in the form of stall on the individual blades. For rotating rows with the highest incidence at root or mid-section the speed of stall propagation lies within a fairly limited range and shows no dependence on the blade geometry. When the incidence is increased well beyond that at which stall first occurs, the stall cell pattern on most rotating rows changes from multiple cells to one or two of very large amplitude, with a marked change in speed of propagation.

Type
Research Article
Information
Aeronautical Quarterly , Volume 16 , Issue 2 , May 1965 , pp. 179 - 186
Copyright
Copyright © Royal Aeronautical Society. 1965

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