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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effect of Number of Heating Walls on Heat Transfer in Ribbed Rectangular Channel

거친 사각채널에서 가열 벽면의 수가 열전달에 미치는 효과

  • Bae Sung Taek (Marine Engineering Dept., Graduate School, Gyeongsang National University) ;
  • Ahn Soo Whan (School of Mechanical & Aerospace Engineering, Gyeongsang National University, Institute of Marine Industry) ;
  • Kim Myoung Ho (Marine Engineering Dept., Graduate School, Gyeongsang National University) ;
  • Lee Dae Hee (School of Mech & Automotive Engineering, Inje University) ;
  • Kang Ho Keun (School of Mechanical & Aerospace Engineering, Gyeongsang National University, Institute of Marine Industry)
  • 배성택 (경상대학교 대학원) ;
  • 안수환 (경상대학교 기계항공공학부 해양산업연구소) ;
  • 김명호 (경상대학교 대학원) ;
  • 이대희 (인제대학교 기계자동차공학과) ;
  • 강호근 (경상대학교 기계항공공학부 해양산업연구소)
  • Published : 2005.06.01
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Abstract

Surface heat transfer of a fully developed turbulent air flow in a $45^{\circ}$ inclined ribbed square duct with two and four heating walls was experimentally investigated, at which the experimental works were peformed for Reynolds numbers ranging from 7,600 to 26,000. The pitch-to-rib height ratio, p/e, was kept at 8 and rib-height-to-channel hydraulic diameter ratio, $e/D_h$ was kept at 0.0667. The channel length-to-hydraulic diameter ratio, $L/D_h$ was 60. The heat transfer coefficient values were decreased with the increase in the number of heat-ing walls. Results of this investigation could be used in various applications of internal channel turbulent flow involving roughened walls.

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References

  1. Han, J. C., 1984, Heat transfer and friction in channels with two opposite rib-roughened walls, J. Heat Transfer, Vol. 106, 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 promoters, J. Eng. Gas Turbine Powers, Vol. 107. pp. 629-635
  3. Han, J. C., 1988, Heat transfer and friction characteristics in rectangular channels with rib turbulators, J. Heat Transfer, Vol. 110, 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, pp. 183-195 https://doi.org/10.1016/0017-9310(88)90235-9
  5. Han, J. C., Ou, S., Park, J. S. and Lei, C. K., 1989, Augumented heat transfer in rectangular channels of narrow aspect ratios with rib turbulators, Int. J. Heat Mass Transfer, Vol. 32, pp. 1619-1630 https://doi.org/10.1016/0017-9310(89)90044-6
  6. Kukreja, R. T., Lau, S. C., McMillin. R. D. and Chandra, P. R., 1991, Effects of length and configuration of transverse discrete ribs on heat transfer and friction for turbulent flow in a square channel, ASME/JSME Thermal Engineering Joint Conference, Vol. 3, Reno, Nevada, pp. 213-218
  7. 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. KSME(B), Vol. 26, pp.I542-1551
  8. Nikuradse, J., 1950, Laws for flow in rough pipes, NACA TM, 1292
  9. Zhang, Y. M., Azad, G. M., Han, J. C. and Lee, C. P., 2000, Turbulent heat transfer enhancement and surface heating effect in square channels with wavy and twisted tape inserts with interrupted ribs, Enhanced Heat Transfer, Vol. 7, pp. 35-49 https://doi.org/10.1615/JEnhHeatTransf.v7.i1.40
  10. Sieder, E. N. and Tate, C. E., 1936, Heat transfer and pressure drop of liquids in tubes, Ind. Eng. Chem., Vol. 28, pp.1429-1936 https://doi.org/10.1021/ie50324a027
  11. Kline, S.J. and McClintock, F. A., 1953, Describing uncertainties in single sample experiments, Mech. Eng., pp.3-8
  12. Chandra, P. R., Alexander, C. R. and Han, J. C., 2003, Heat transfer and friction behaviors in rectangular channels .with varying number of ribbed walls, Int. J. Heat Mass Transfer, Vol. 46, pp. 481-495 https://doi.org/10.1016/S0017-9310(02)00297-1