Heat Transfer in Two-Pass Rotating Rectangular Channels (AR=1:2 and AR=1:4) With Smooth Walls
Author:
Fu Wen-Lung1, Wright Lesley M.1, Han Je-Chin1
Affiliation:
1. Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843-3123
Abstract
This paper reports the heat transfer coefficients in two-pass rotating rectangular channels [aspect ratio (AR=1:2 and AR=1:4)] with smooth walls. The experiments are conducted at four Reynolds numbers: 5000, 10,000, 25,000, and 40,000. The rotation numbers vary from 0.0 to 0.21 and 0.0 to 0.3 for AR=1:2 and AR=1:4, respectively. For each channel, two channel orientations are studied, 90° and 45° with respect to the plane of rotation. The results showed that the 180° sharp turn significantly enhanced heat transfer on both the leading and trailing surfaces in the turn region for both nonrotating and rotating channels. The results also showed that the rotation effect increased the heat transfer on the trailing surface in the first pass, but reduced the heat transfer on the leading surface. However, the heat transfer difference between the leading and trailing walls in the second pass is relatively small compared to the first pass due to strong turn effect.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference19 articles.
1. Han, J. C., Dutta, S., and Ekkad, S. V., 2000, Gas Turbine Heat Transfer and Cooling Technology, Taylor and Francis, New York. 2. Kays, W. M., and Crawford, M. E., 1993, Convective Heat and Mass Transfer, 3rd ed., McGraw–Hill, New York, pp. 311–349. 3. Fan, C. S., and Metzger, D. E., 1987, “Effects of Channel Aspect Ratio on Heat Transfer in Rectangular Passage Sharp 180° Turn,” ASME Paper No. 87-GT-113. 4. Han, J. C., Chandra, P. R., and Lau, S. C., 1988, “Local Heat/Mass Transfer in Distributions Around Sharp 180° Turns in Two-Pass Smooth and Rib-Roughened Channels,” ASME J. Heat Transfer, 110, pp. 91–98. 5. Wagner, J. H., Johnson, B. V., and Hajek, T. J., 1991a, “Heat Transfer in Rotating Passage with Smooth Walls and Radial Outward Flow,” ASME J. Turbomach., 113, pp. 42–51.
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