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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

EXPERIMENTAL INVESTIGATION OF TURBULENT HEAT TRANSFER IN BOUNDARY LAYER OF SUPERSONIC HIGH-TEMPERATURE AIR FLOW ON FLAT PLATE IN SHOCK TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC11.910
pages 225-229

Abstract

New experimental data are obtained on turbulent heat transfer under conditions of supersonic flow of high-temperature air on a flat plate (temperature up to 6690 K, pressure up to 5 atm, Mach numbers up to 3.5) under high cooling of the boundary layer and strong variability of the air properties for the enthalpy factor values of 0.0075 to 0.115. The investigations were performed with a shock tube and calorimetric sensors of the heat flux. Data are given, which have been obtained for the first time, on the critical Reynolds numbers of transition from the laminar to turbulent flow mode in the boundary layer and on the extent of the transition zones for conditions of high cooling. It is demonstrated that the second approximation of the Kutateladze-Leont'ev theory, including the finite Reynolds numbers and the variability of the physical properties of gas, adequately describes the experimental data. Of the semiempirical calculation methods, the method of Sommer and Short yields the best agreement with the experimental data.