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RESEARCH PAPERS

Effectiveness and Heat Transfer With Full-Coverage Film Cooling

[+] Author and Article Information
D. E. Metzger, D. I. Takeuchi, P. A. Kuenstler

Mechanical Engineering Department, Arizona State University, Tempe, Ariz.

J. Eng. Power 95(3), 180-184 (Jul 01, 1973) (5 pages) doi:10.1115/1.3445720 History: Received January 04, 1973; Online July 14, 2010

Abstract

The paper presents experimental results for performance of full-coverage film cooled surfaces. Effectiveness and heat transfer are measured on plane surfaces with discrete injection through the surface at an array of points into a turbulent mainstream boundary layer. The injection is normal to the surface, through circular holes arranged in both in-line and staggered patterns with 4.8 hole diameters used for both the row-to-row spacing and the hole-to-hole spacing within a single row. Both the film and mainstream fluids are air, and property differences are kept small throughout the study. Uniform injection over the entire array at film-to-mainstream velocity ratios of 0.1 and 0.2 with a uniform wall temperature boundary condition are covered. Results are compared with predictions using superposition of available single hole local effectiveness values.

Copyright © 1973 by ASME
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