Effect of Tip Clearance on the Thermal and Hydrodynamic Performance of a Shrouded Pin Fin Array-Reference-Cited by-同舟云学术

Effect of Tip Clearance on the Thermal and Hydrodynamic Performance of a Shrouded Pin Fin Array

Published:2003-11-19 Issue:6 Volume:125 Page:999-1006
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Moores Kevin A.¹,Joshi Yogendra K.²

Affiliation:

1. CALCE Electronic Products and Systems Center, Mechanical Engineering Dept., University of Maryland, College Park, MD 20742

2. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

Abstract

The effect of introducing tip clearance to a liquid cooled array of shrouded pins fins is examined. Three arrays of height to diameter ratio ranging from 0.5 to 1.1 were evaluated experimentally. The arrays were exposed to a uniform heat flux of 0.02 to 0.26 W/mm2 and cooled with water through a nominal Reynolds number range of 200 to 10,000. Tip clearance of 0 to 25% of pin height was assessed. Mean heat transfer rates and adiabatic pressure drop across the array were determined and empirical correlations are proposed. The introduction of clearance was seen to increase overall heat transfer in some cases.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/125/6/999/5790848/999_1.pdf

Reference24 articles.

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2. Hwang, J. J., and Lu, C. C., 1999, “Detailed heat transfer characteristic comparisons in straight and 90-deg turned trapezoidal ducts with pin fin arrays,” Int. J. Heat Mass Transfer, 42, pp. 4005–4016.

3. Hwang, J. J., Lai, D. Y., and Tsia, Y. P., 1999B, “Heat transfer and pressure drop in pin fin trapezoidal ducts,” ASME J. Turbomach., 121, pp. 264–271.

4. Hwang, J. J., and Lu, C. C., 2001, “Lateral flow effects on endwall heat transfer and pressure drop in a pin-fin trapezoidal duct of various pin shapes,” ASME J. Turbomach., 123, pp. 133–139.

5. Chyu, M. K. , 1990, “Heat transfer and pressure drop for short pin-fin arrays with pin endwall fillet,” J. Heat Transfer, 112, pp. 926–932.

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