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RESEARCH PAPERS

An Improved Incidence Losses Prediction Method for Turbine Airfoils

[+] Author and Article Information
S. H. Moustapha, S. C. Kacker

Pratt & Whitney Canada Inc.

B. Tremblay

Department of Mechanical and Aeronautical Engineering, Carleton University, Ottawa, Ontario, Canada K1S 5B6

J. Turbomach 112(2), 267-276 (Apr 01, 1990) (10 pages) doi:10.1115/1.2927647 History: Received February 14, 1989; Online June 09, 2008

Abstract

The off-design performance of axial turbines is usually predicted by calculating the incidence losses using empirical correlations. Periodic review and improvement to these prediction methods, to reflect recent turbine designs and test results, are essential for the accurate assessment of losses in turbine airfoils. The purpose of the present work is to evaluate existing turbine incidence loss correlations, and present an improved prediction method for profile and secondary losses at off-design conditions which correlates better with the available experimental results. The incidence losses are shown to be a function of leading edge diameter, pitch, aspect ratio and channel convergence.

Copyright © 1990 by The American Society of Mechanical Engineers
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