Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Heat Transfer Characteristics of Inclined Jet Impinging on a Pin Fin Heat Sink

경사진 충돌제트를 이용한 핀 휜 히트싱크의 열특성 연구

  • 홍기호 (한국과학기술원 대학원 기계공학과) ;
  • 송태호 (한국과학기술원 기계공학과)
  • Published : 2004.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

An inclined jet impinging on a pin fin heat sink is proposed and investigated experimentally. To investigate the flow pattern, flow visualization using fluorescence and velocity measurement using particle image velocimetry(PIV) are conducted with water. The jet impinges over a wide span of the heat sink with a large recirculation in the upper free space and occasionally with another smaller one in the upstream corner. Further, thermal experimentation is conducted using air to obtain temperature profiles using a thermocouple rake in the air and using thermal image on the heat sink back plate, with impinging angles of 35, 45 and 55 degrees. The Reynolds number range based on the nozzle slot is varied from 1507 to 6405. The results show that impinging angle of 55 degree shows the largest heat transfer capability. The results of thermal experiment are compared and discussed with those of flow visualization.

Keywords

References

  1. Sara, O. N., Yapici, S. and Yilmaz, M., 2001, 'Second Law Analysis of Rectangular Channels with Square Pin-Fins,' Int. Comm. Heat Mass Transfer, Vol. 28, No.5, pp. 617-630 https://doi.org/10.1016/S0735-1933(01)00266-4
  2. Shaukatullah, H., Storr, R. W., Hansen, J. B. and Gaynes, A. M., 1996, 'Design and Optimization of Pin Fin Heat Sinks for Low Velocity Applications,' IEEE Trans. on Components, Packaging, and Manufacturing Technology-Part A, Vol. 19, No. 5, pp. 486-494 https://doi.org/10.1109/95.554929
  3. Sparrow, E. W. and Larson, E. D., 1982, 'Heat Transfer from Fin-Fins Situated in an Oncoming Longitudinal Flow which Turns to Crosstlow,' Int. J. Heat Mass Transfer, Vol. 25, No. 5, pp. 603-614 https://doi.org/10.1016/0017-9310(82)90165-X
  4. Ledezma, G., Morega, A. M. and Bejan, A., 1996, 'Optimal Spacing Between Pin Fins With Impinging Flow,' J. Heat Transfer, Trans. ASME, Vol. 118, pp. 570-577 https://doi.org/10.1115/1.2822670
  5. Maveety, J. G. and Hendricks, J. F., 1999, 'A Heat Sink Performance Study Considering Material, Geometry, Nozzle Placement, and Reynolds Number With Air Impingement,' J. Heat Transfer, Trans. ASME, Vol. 121, pp. 156-161
  6. Lloyd, J. R. and Moran, W. R., 1974, 'Natural Convection Adjacent to Horizontal Surfaces of Various Plate Forms,' ASME Paper 74-Wa/HT-66
  7. Churchill, S. W. and Chu, H. H. S., 1975, 'Correlation Equations for Laminar and Turbulent Free Convection from a Vertical Plate,' Int. J. Heat Mass Transfer, Vol. 18, pp. 1323-1329 https://doi.org/10.1016/0017-9310(75)90243-4
  8. Holman, J. P., 1997, 'Heat Transfer,' 8th ed., McGraw-Hill, New York
  9. Incropera, F. P. and DeWitt, K. P., 1996, 'Fundamentals of Heat and Mass Transfer,' 4th ed., John Wiley & Sons, New York