설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제29권8호
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  • Pages.401-407
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  • 2017
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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30° 경사 리브가 있는 확대 채널 통로 내의 열전달 증가

Heat Transfer Enhancement in a Divergent Passage with 30° Inclined Ribs

  • 이명성 (경남지역사업평가단) ;
  • 안수환 (경상대학교 해양산업연구소 기계시스템공학과)
  • Lee, Myung Sung (Evaluation Team, Gyeongnam Institute for Regional Program Evaluation) ;
  • Ahn, Soo Whan (Dpt. of Mechanical and System Engineering, Institute of Marine Industry, Gyeongsang National University)
  • 투고 : 2017.02.09
  • 심사 : 2017.05.26
  • 발행 : 2017.08.10
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초록

The effect of different rib geometries such as V-shaped continuous (case A), parallel broken (case B), and V-shaped broken (case C) ribs on local heat transfer distributions and pressure drops in a divergent channel with $30^{\circ}$ inclined ribs on one wall or two walls was investigated for Reynolds numbers from 22,000 to 75,000. Top and bottom walls were insulated; two side walls were uniformly heated in the divergent channel. Heated walls were composed of 10 isolated coper sections and length-to-outlet hydraulic diameter ratio of 10. Rib height-to-outlet hydraulic diameter ratio was 0.1, and rib pitch-to-height ratio equaled 10. Results revealed that V-shaped continuous rib (case A) produced approximately 1.4 times higher average Nussselt number than in the parallel broken rib (case B), and V-shaped broken rib (case C) in the channel with two ribbed walls at Re = 54,000.

키워드

참고문헌

  1. Han, J. C., 1984, Heat transfer and friction in channels with two opposite rib-roughened walls, ASME J. Heat Transfer, Vol. 106, No. 4, pp. 774-781. https://doi.org/10.1115/1.3246751
  2. Han, J. C., Park, J. S., and Lei, C. K., 1985, Heat transfer enhancement in channels with turbulence promotors, ASME J. Engng Gas Turbine Pwr, Vol. 107, No. 3, pp. 629-635.
  3. Han, J. C., 1988, Heat transfer and friction characteristics in rectangular channels with rib turbulators, ASME J. Heat Transfer, Vol. 110, No. 2, pp. 321-328. https://doi.org/10.1115/1.3250487
  4. Han, J. C. and Park, J. S., 1988, Developing heat transfer in rectangular channels with rib turbulators, Int. J. Heat Mass Transfer, Vol. 31, No. 1, pp. 183-195. https://doi.org/10.1016/0017-9310(88)90235-9
  5. Han, J. C. and Zhang, P., 1989, Pressure loww distribution in three-pass rectangular channels with rib turbulators, ASME J. Turbomachinery, Vol. 111, No. 4, pp. 515-521. https://doi.org/10.1115/1.3262302
  6. Han, J. C. and Zhang, P., 1991, Effect of rib-angle-orientation on local mass transfer distribution in a three-pass rib-roughened channel, ASME J. Turbomachinery, Vol. 113, No. 1, pp. 123-130. https://doi.org/10.1115/1.2927730
  7. Ahn, S. W., Lee, M. S., Jeong, S. S., and Bae, S. T., 2014, Effect of rib pitch on heat transfer and friction factor in a two wall divergent channel, Korean J. of Air-Cond. & Refri. Eng., Vol. 26, No. 4, pp.175-180(in Korean). https://doi.org/10.6110/KJACR.2014.26.4.175
  8. Lee, M. S. and Ahn, S. W., 2016, Heat transfer friction factors in the ribbed square convergent and divergent channels, Heat and Mass Transfer, Vol. 52, No. 6, pp. 1109-1116. https://doi.org/10.1007/s00231-015-1630-3
  9. Bergman, T. L., Incropera, F. P., and Lavine, A. S., 2011, Fundamentals of Heat and Mass Transfer.
  10. Kline, S. J. and McClintock, F. A., 1953, Describing uncertainties in single-sample experiments, Mechanical Engineering, Vol. 75, pp. 3-8.
  11. Choi, C., Rhee, D. H., and Cho, H. H., 2002, Heat/mass transfer and pressure drop in a square duct with V-shaped ribs, Trans. of KSME(B), Vol. 26, No. 11, pp. 1542-1551(in Korean).
  12. Taslim, M. E., Li, T., and Kercher, D. M., 1994, June, Experimental heat transfer and friction in channels roughened with angled, V-shaped and discrete ribs on two opposite walls, In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, pp. V004T09A018.