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Heat Transfer and Friction Behaviour in a Channel with an Inclined Perforated Baffle  

Krishna Putra, Ary Bachtiar (Dept. of Mechanical System Engineering, Graduate School, Gyeongsang National University)
Ahn, Soo-Whan (School of Mechanical & Aerospace Engineering, Institute of Marine Industry, Gyeongsang National University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.16, no.2, 2008 , pp. 70-76 More about this Journal
Abstract
The effects of the inclined perforated baffles on the distributions of the local heat transfer coefficients and friction factors for air flows in a rectangular channel were determined for Reynolds numbers from 23,000 to 57,000. Four different types of the baffle are used. The inclined baffles have the width of 19.8cm, the square diamond type hole having one side length of 2.55cm, and the inclination angle of $5^{\circ}$, whereas the corresponding channel width-to-height ratio was 4.95. Results show that the heat transfer and friction factor depend significantly on the number of baffle holes and Reynolds number. The friction factor decreases with increasing Reynolds number and the number of holes on the baffle, and the heat transfer performance of baffle type II (3 hole baffle) has the best value.
Keywords
Rectangular duct; Inclined baffle; Heat transfer; Friction factor; Square diamond type hole;
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1 Berner, C., Durst, F., and McEligot, D. M., 1984, Flow around baffles, ASME J. Heat Transfer, Vol. 106, pp. 743 -749   DOI
2 Kline, S. J., and McClintock, F. A., 1953, Describing uncertainty in single sample experiments, Mechanical Engineering, Vol. 75, pp. 3-8
3 Yilmaz, M., 2003, The effect of inlet flow baffles on heat transfer, Int. Comm. Heat Mass Transfer, Vol. 30, No. 8, pp. 1169-1178   DOI   ScienceOn
4 Habib, M. A., Mobarak, A. M., Sallak, M. A., Abdel Hadi, E. A., and Affify, R. I., 1994, Experimental investigation of heat transfer and flow over baffles of different heights, ASME J. Heat Transfer, Vol. 116, No. 2, pp. 363-368   DOI   ScienceOn
5 Dutta, S., Dutta, P., Jones, R. E., and Khan, J. A., 1997, Experimental study of heat transfer coefficient enhancement with inclined solid and perforated baffles, Int. Mech. Engineering Congress and Exposistion, ASME Paper No. 97-WA/HT-4, November 16-21, Dallas, Texas
6 Dutta, P., and Dutta, S., 1998, Effect of baffle size, perforation and orientation on internal heat transfer enhancement, Int. J. Heat Mass Transfer, Vol. 41, No. 19, pp. 3005-3013   DOI   ScienceOn
7 Kays, W. M., and Crawford, M. E., 1990, Convective heat and mass transfer, 2nd ed., McGraw-Hill, New York