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The effect of very low axial clearances on the performance of an axial-flow compressor stage

Published online by Cambridge University Press:  20 April 2006

S. B. Furber
S. B. Furber
Affiliation:
Acorn Computers Limited, Fulbourn Road, Cherry Hinton, Cambridge CB1 4JN
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Abstract

The results of tests on an axial-flow compressor stage designed to allow operation at unusually low axial clearances are presented. The axial clearance was varied between 1 and 33 % of the blade chord whilst the compressor was running, and the stage pressure rise showed a peak at a clearance around 4 % of blade chord. The pressure rise was 8 % higher at this clearance than at 33 % of chord, with no significant change in the stage efficiency. In addition, reducing the clearance was found under some conditions to bring the stage from a stalled to a fully unstalled state. The sound output of the stage was measured at all clearances, and the results show a significant increase in the high harmonics of the blade-passing frequency at low axial clearances.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 159 , October 1985 , pp. 477 - 485
Copyright
© 1985 Cambridge University Press

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References

Aschenbrenner, A. 1966 Investigation into the effect of the space between rotor and stator on the operational behaviour of the blading of a single stage pump. Konstruktion im Maschinen-Apparate- und Gerätebau 18, 336–345.Google Scholar
Furber, S. B. & Ffowcs Williams, J. E. 1979 J. Fluid Mech. 94, 519–540.
Furber, S. B. 1980 Is the Weis-Fogh principle exploitable in turbomachines? Ph.D. dissertation, Cambridge University Engineering Department.
Jenny, R. 1976 Variable geometry axial compressors. In Industrial Compressors, VKI lecture series 91.
Smith, L. H. 1970 Casing boundary layers in multistage axial flow compressors. In Flow Research on Blading (ed. L. S. Dzung). Elsevier.