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RESEARCH PAPERS

Simulation of Heat Transfer From Flow With High Free-Stream Turbulence to Turbine Blades

[+] Author and Article Information
E. Fridman

College of Engineering, The University of Toledo, Toledo, OH 43612

J. Turbomach 119(2), 284-291 (Apr 01, 1997) (8 pages) doi:10.1115/1.2841111 History: Received May 19, 1995; Online January 29, 2008

Abstract

The present investigation is devoted to one of the most difficult problems in the gas turbine industry: predicting the heat transfer to turbine blades. It is known that one of the important factors that affects heat transfer coefficients is a significant level of turbulence in the flow that surrounds a turbine blade. The influence of free-stream turbulence on heat transfer coefficients for a flat plate boundary layer with zero pressure gradient or in the vicinity of the stagnation point of a circular cylinder is investigated numerically. An algebraic relaxation-length model of turbulence is applied in order to simulate real situations in flows with a high level of free-stream turbulence. The results, temperature and velocity profiles, and heat transfer and drag coefficients, are compared with available experimental data. The proposed method is recommended for practical calculations of heat transfer coefficients on turbine blades.

Copyright © 1997 by The American Society of Mechanical Engineers
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