Film-Cooling Effectiveness With Injection Through a Porous Section

[+] Author and Article Information
R. J. Goldstein, G. Shavit, T. S. Chen

Heat Transfer Laboratory, Mechanical Engineering Department, University of Minnesota, Minneapolis, Minn.

J. Heat Transfer 87(3), 353-359 (Aug 01, 1965) (7 pages) doi:10.1115/1.3689114 History: Received October 05, 1964


An experimental study of the effectiveness of film cooling following secondary air injection through a porous section into a turbulent free stream is presented. Boundary-layer velocity and temperature profiles are described. The adiabatic wall temperatures are presented in terms of the film-cooling effectiveness. The effects of varying the secondary air temperature, the blowing rate, and the free-stream velocity are studied. It is found that the protection given to a surface downstream of a porous section through which air is injected compares favorably to earlier studies where the secondary air was injected nearly tangential to the surface.

Copyright © 1965 by ASME
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