The Effect of a Transversely Injected Stream on the Flow through Turbine Cascades—Part III: Influence of Aspect Ratio

[+] Author and Article Information
B. A. Aburwin, N. R. L. Maccallum

Department of Mechanical Engineering, University of Glasgow, Glasgow, Scotland

J. Eng. Power 101(1), 61-67 (Jan 01, 1979) (7 pages) doi:10.1115/1.3446462 History: Received December 14, 1977; Online July 14, 2010


An experimental investigation has been made of the effect of a transversely injected stream on the flow through turbine cascades similar to those in which previous studies [1, 2] had been made, but having aspect ratios of 1.5 and 1.0 compared to the previous value of 3.0. New instrumentation includes a five-hole probe. The average losses in stagnation pressure and the changes in flow capacity remain in agreement with one-dimensional theory. The exit vortex is moved towards the end-wall as aspect ratio is reduced. The strength of the vortex is diminished when the aspect ratio is reduced from 3.0 to 1.5, but there is little change for the further reduction of aspect ratio.

Copyright © 1979 by ASME
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