The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Inlet Velocity Distribution on the Heat Transfer Coefficient in a Rotating Smooth Channel

입구 속도 분포가 매끈한 회전유로 내 열전달계수에 미치는 영향

  • 최은영 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 이용진 (한국항공대학교 항공우주 및 기계공학과 대학원 (국방품질기술원)) ;
  • 전창수 (한국항공대학교 항공우주 및 기계공학부) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2011.08.10
  • Accepted : 2011.11.07
  • Published : 2011.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of inlet velocity profile on the heat transfer coefficient in a rotating smooth channel was investigated experimentally. Three simulated inlet flow conditions of fully developed, uniform, and distorted inlet conditions were tested. The Reynolds number based on the channel hydraulic diameter was ranged from 10,000 to 30,000 and the transient liquid crystal technique was used to measure the distribution of the heat transfer coefficient in the rotating channel. Results showed that the overall heat transfer coefficient increased as the Reynolds number increased. Also, the distribution of the heat transfer coefficient was strongly affected by the inlet flow condition. Generally, the fully developed flow simulated condition showed the highest heat transfer coefficient.

Keywords

References

  1. Han, J. C., Dutta, S. and Ekkad, S. V., 2000, "Gas Turbine Heat Transfer and Cooling Technology," Taylor & Francis, New York.
  2. Moon, H. K., O'Connel, T., and Glezer, B., 2000, "Channel Height Effect on Heat Transfer and Friction in a Dimpled Passage," American Society of Mechanical Engineers (ASME), International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, Indiana, 99-GT-163.
  3. Mahmood, G. I., Hill, M. L., Nelson, D. L. and Ligrani, P. M., 2000, "Local Heat Transfer and Flow Structure on and above a Dimpled Surface in a Channel," American Society of Mechanical Engineers (ASME), Proceedings of ASME TURBO EXPO 2000, Munich, Germany, 2000-GT-230.
  4. Wang, Z., Yeo, K. S. and Khoo, B. C., 2003, "Numerical Simulation of Laminar Channel Flow over Dimpled Surface," 16th AIAA Computational Fluid Dynamics Conference 23-26 June 2003, Orlando, Florida, AIAA 2003-3964, pp. 1-11.
  5. Khalatov, A., Byerley, A., Ochoa, D. and Min, S. K., 2004, "Flow Characteristics within and Downstream of Spherical and Cylindrical Dimple on a Flat Plate at Low Reynolds," 2004, Power for Land, Sea, and Air, June 14-17, 2004, Vienna, Austria, GT2004-53656, pp.589-602.
  6. Shin, S. M., Lee, K. S., Park, S. D., and Kwak, J. S., 2009, "Measurement of the heat transfer coefficient in the dimpled channel: effects of dimple arrangement and channel height," Journal of Mechanical Science and Technology, 23 pp. 624-630. https://doi.org/10.1007/s12206-008-1211-1
  7. Han, J. C., Glicksman, L. R., Rohsenow, W. M., 1978, "An Investigation of Heat Transfer," Vol. 21, pp. 1143-1156. https://doi.org/10.1016/0017-9310(78)90113-8
  8. Park, J. S., Han, J. C., Huang, Y. and Ou, S., 1992, "Heat transfer performance comparisons of five different rectangular channels with parallel angled ribs," International Journal of Heat and Mass Transfer, Vol. 35, No. 11, pp. 2891-2903. https://doi.org/10.1016/0017-9310(92)90309-G
  9. Stephens, M. A., Shih, T. I-P. and Civinskas, K. C., 1995, "Effects of Inclined Rounded Ribs on Flow and heat Transfer in a Square Duct," 30th, AIAA Thermophysics Conference, June, 19-22, AIAA. 95-2115, pp. 1-12.
  10. Al-Hadhrami, L., and Han, J. C., 2002, "Effect of Rotation on Heat Transfer in Two-pass Square Channels With Five Different Orientations of $45^{\circ}$ Angled Rib Turbulators," International Journal of Heat and Mass Transfer, Vol. 46, pp. 653-669.
  11. Liou, T.-M., Chang, S. W., Hung, J. H., and Chiou, S. F., 2007, "High Rotation Number Heat Transfer of A 45 degrees Rib-roughened Rectangular Duct With Two Channel Orientations," International Journal Heat and Mass Transfer, Vol. 50, pp. 4063-4078. https://doi.org/10.1016/j.ijheatmasstransfer.2007.01.060
  12. Harasgama, S. P., and Morris, W. D., 1988, "The Influence of Rotation on The Heat Transfer Characteristics of Circular, Triangular and Square-sectioned Coolant Passages of Gas Turbine Rotor Blades," ASME Jounal of Turbomachinery, Vol. 110, pp. 44-50. https://doi.org/10.1115/1.3262166
  13. Iacovides, H., Jackson, D. C., Kelemenis G., Launder, B. E., and Yuan, Y.-M., 2001, "Flow and Heat Transfer in a Rotating U-bend With $45^{\circ}$ Ribs," International Journal of Heat and Fluid Flow, Vol. 22, pp. 308-314. https://doi.org/10.1016/S0142-727X(01)00093-5
  14. Griffith, T. S., Luai Al-Hadhrami, and Han, J. C., 2002, "Heat Transfer in Rotating Rectangular Cooling Channels(AR=4) with Dimples.", American Society of Mechanical Engineers (ASME). Proceedings of ASME TURBO EXPO 2002, Amsterdam, Neterlands, GT-2002-30220.
  15. Kim, S., Lee, Y. J., Choi, E. Y., and Kwak, J. S., 2011, "Dimple Configuration on Heat Transfer Coefficient in a Rotating Channel.", Journal of Thermophysics and Heat Transfer, Vol. 25, No. 1, pp. 165-172. https://doi.org/10.2514/1.50255
  16. Kwak, J. S., 2008, "Comparison of Analytical Superposition Solutions of the Transient Liquid Crystal Technique.", Journal of Thermophsics and Heat Transfer, Vol. 22, No. 2, pp. 290-295. https://doi.org/10.2514/1.34274
  17. S. Wagner, M. Koulla, P. Ott, B. Weigand, and V. von Wolfersdorf, 2005, "The transient liquid crystal technique: Influence of surface curvature and finite wall thickness.", Journal of Turbomachinery, 127 pp. 175-182. https://doi.org/10.1115/1.1811089
  18. Moffat, R. J., 1988, "Describing the Uncertainties in Experimental Results.", Journal of Experimental Thermal and Fluid Science, 1, pp. 3-17. https://doi.org/10.1016/0894-1777(88)90043-X