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RESEARCH PAPERS: Jets, Wakes and Impingement

Local Heat Transfer in a Rotating Square Channel With Jet Impingement

[+] Author and Article Information
S.-S. Hsieh, J.-T. Huang, C.-F. Liu

Department of Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, R.O.C.

J. Heat Transfer 121(4), 811-818 (Nov 01, 1999) (8 pages) doi:10.1115/1.2826070 History: Received August 24, 1997; Revised June 15, 1999; Online December 05, 2007

Abstract

The influence of rotation and jet mass flow rate on the local heat transfer coefficient for a single confined impinging round jet with a fixed jet-to-wall spacing of H/d = 5 was studied for the jet Reynolds number from 6500 to 26,000 and the rotational Reynolds number from 0 to 112,000. The local heat transfer coefficient along the surface is measured and the effect of the rotation on the stagnation (peak) point, local and average Nusselt number, is presented and discussed. Furthermore, a correlation was developed for the average Nusselt number in terms of the parameters of Rej and ReΩ . In general, the combined jet impingement and rotation effect are shown to affect the heat transfer response. Rotation decreases the average Nusselt number values from 15 to 25 percent in outward and inward radial flow, respectively. Finally, comparisons of the present data with existing results for multijets with rotation were also made.

Copyright © 1999 by The American Society of Mechanical Engineers
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