Cooling-Air Injection Into Secondary Flow and Loss Fields Within a Linear Turbine Cascade

[+] Author and Article Information
A. Yamamoto

Head of Turbine Laboratory, National Aerospace Laboratory, Chofu, Tokyo, Japan

Y. Kondo

Aoyama University, Setagaya, Tokyo, Japan

R. Murao

Department of Mechanical Engineering, Aoyama University, Setagaya, Tokyo, Japan

J. Turbomach 113(3), 375-383 (Jul 01, 1991) (9 pages) doi:10.1115/1.2927886 History: Received January 31, 1990; Online June 09, 2008


In order to understand overall performance and internal flows of air-cooled turbine blade rows, flows in a model linear cascade were surveyed with secondary air injection from various locations of the blade surfaces. The secondary air interacted with the cascade passage vortices and changed the loss distribution significantly. The cascade overall loss decreased when the air was injected along the mainstream and increased when the air was injected against the mainstream from some locations of the blade leading edge. Effects on overall kinetic energy of the secondary flows and on the cascade outlet flow angle were also discussed in this paper.

Copyright © 1991 by The American Society of Mechanical Engineers
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