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RESEARCH PAPERS

Short Duration Heat Transfer Studies at High Free-Stream Temperatures

[+] Author and Article Information
D. M. Kercher

Gas Turbine Division, General Electric Company, Schenectady, N.Y. 12345

R. E. Sheer

Corporate Research and Development, General Electric Company, Schenectady, N.Y. 12345

R. M. C. So

Department of Mechanical and Energy Systems Engineering, Arizona State University, Tempe, Ariz.

J. Eng. Power 105(1), 156-166 (Jan 01, 1983) (11 pages) doi:10.1115/1.3227377 History: Received December 07, 1981; Online September 28, 2009

Abstract

This paper describes short duration heat transfer measurements on a flat plate and a gas turbine nozzle airfoil at high free-stream temperatures. A shock tube generated the high-temperature and pressure air flow. Thin-film heat gages recorded the surface heat flux. The flat plate was tested both in the shock tube and in a shock tunnel placed aft of the tube. Shock tunnel tests on the nozzle airfoil measured the local heat transfer distribution. The flat plate free-stream temperatures varied from 830°R (460 K) to 3190°R (1770 K) for a Tw /TT, g temperature ratio of 0.17 to 0.64 at Mach numbers from 0.12 to 1.34. The nozzle measurements at a Tw /TT, g of 0.35 to 0.39 generally indicate that pressure (concave) surface heat transfer coefficients are high, whereas the suction (convex) surface shows much lower heat transfer coefficients than a turbulent flat-plate correlation.

Copyright © 1983 by ASME
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