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RESEARCH PAPERS

Film Cooling Effectiveness for Injection from Multirow Holes

[+] Author and Article Information
M. Sasaki, K. Takahara, T. Kumagai

Aeroengine Division, National Aerospace Laboratory, Tokyo, Japan

M. Hamano

Waseda University, Tokyo, Japan

J. Eng. Power 101(1), 101-108 (Jan 01, 1979) (8 pages) doi:10.1115/1.3446430 History: Received December 14, 1977; Online July 14, 2010

Abstract

Experimental results are presented for film cooling effectiveness with injection from both a single row and multiple rows of holes with spanwise hole-to-hole spacings of three hole diameters. In the multi-row cases, the injection holes were arranged in staggered patterns with streamwise row-to-row spacings of five or ten hole diameters. Adiabatic wall temperature distributions near and downstream of injection holes were well visualized using a scanning infrared camera. The effect of mainstream pressure gradient was partially included. The additive nature of multi-row film cooling was demonstrated experimentally, in agreement with the Sellers superposition model.

Copyright © 1979 by ASME
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