The Influence of Load Distribution on Secondary Flow in Straight Turbine Cascades

[+] Author and Article Information
A. P. Weiss, L. Fottner

Institut für Strahlantriebe, Universität der Bundeswehr München, 8014 Neubiberg, Federal Republic of Germany

J. Turbomach 117(1), 133-141 (Jan 01, 1995) (9 pages) doi:10.1115/1.2835631 History: Received February 19, 1993; Online January 29, 2008


This paper describes an experimental study of the three-dimensional flow within two highly loaded turbine cascades subjected to the same overall load but different load distributions. Data were obtained using pneumatic probes, pressure tappings, and a surface flow visualization technique. It is found that the general nature of the flow is similar for both cascades. In the exit plane the cascades show different spanwise loss distributions. However, the averaged secondary loss is quite similar in this plane. Examining the measurements farther downstream and also by comparing the calculated mixed-out values, it becomes clear that a higher magnitude of secondary loss is generated by the front-loaded cascade.

Copyright © 1995 by The American Society of Mechanical Engineers
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