Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

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2003, Volume10

Issue 1-2

162 pages

DOI: 10.1615/JFlowVisImageProc.v10.i12

Issue price - $280.00

W. M. Yan
Department of Mechanical Engineering, Hua Fan University Shih-Ting, Taipei, 22305, Taiwan, ROC

H. C. Liu
Department of Mechanical Engineering, Hua Fan University Shih-Ting, Taipei, 22305, Taiwan, ROC

C. Y. Soong
Department of Aeronautical Engineering, Feng Chia University Seatwen, Taichung 40745, Taiwan, ROC

Wen-Jei Yang
Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan 48109, U.S.A.

The objective of the present experimental work is the study of local heat transfer performance over a target plate under impingement of inline and staggered jet arrays by a liquid crystal thermograph technique. Three jet-to-target spacings Z (= z/d) of 3, 6, and 9 with inline and staggered jet arrays were considered at jet Reynolds numbers Re = 1500, 3000, and 4500 in three different exit-flow orientations. The results show that the local heat transfer rates are characterized by obvious periodic-type variation of Nusselt number distributions. The downstream peaks are diminished with increasing cross-flow effect. The best heat transfer performance is obtained with the cross flow exiting from both ends of the impingement channel. The inline jet array produces relatively higher local and overall heat transfer rates than those of the staggered jet array. Additionally, in the present results of 3 Ј Z Ј 9, higher heat transfer rates are found for the system with a smaller jet-to-plate spacing.

DOI: 10.1615/JFlowVisImageProc.v10.i12.70 Download article, 24 pages

Article price - $40.00

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