Influence of Secondary Flow on Turbine Erosion

[+] Author and Article Information
A. Hamed

Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45221

J. Turbomach 111(3), 310-314 (Jul 01, 1989) (5 pages) doi:10.1115/1.3262270 History: Received December 01, 1987; Online November 09, 2009


This work presents the results of an investigation conducted to study the effect of secondary flow on blade erosion by coal ash particles in axial flow gas turbines. The particle dynamics and their blade impacts are determined from a three-dimensional trajectory analysis within the turbine blade passages. The blade material erosion behavior and the particle rebound characteristics are simulated using empirical equations derived from experimental measurements. The results demonstrate that the secondary flow has a significant influence on the blade erosion intensity and pattern for the typical ash particle size distribution considered in this investigation.

Copyright © 1989 by ASME
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