DOI QR코드

DOI QR Code

An Experiment on Heat Dissipation from Aluminum foam Heat Sinks in an Air Multi-Jet Impingement

다중 충돌 공기제트에서 발포 알루미늄 방열기의 방열 특성 실험

  • Published : 2002.08.01

Abstract

The present experiment investigates the effects of pore density f of aluminum foam heat sinks, the jet-to-jet spacing X and the nozzle plate-to-target surface spacing H of 3$\times$3 square impinging arrays on the averaged Nusselt number. The performance of the aluminum foam heat sinks and the rectangular plate heat sink is evaluated in terms of the enhancement factor. /equation omitted/. The multiple impinging jet with X/d=4.0 displays higher Nusselt numbers than single impinging jet for 12.0$\leq$H/d$\leq$20.0. With the variation of the jet-to-jet spacing, the aluminum foam heat sink of 10 PPI show higher Nusselt numbers than the 20 and 40 PPI aluminum foam heat sinks. Further, the 10 PPI aluminum foam heat sink demonstrates 26% higher enhancement factor than the rectangular plate heat sink in the range of 7000$\leq$Re$\leq$11000.

References

  1. Hani A. El-Sheikh and Suresh V. Garimella, 2000, 'Heat Transfer from Pin-Fin Heat Sinks under Multiple Impinging Jets,' IEEE Trans. on Advanced Packaging, Vol. 23, pp.113-120 https://doi.org/10.1109/6040.826769
  2. Paek, J. W., Kim, S. Y. and Kang, B. H., 2001, 'Heat Transfer from a Porous Heat Sink by Air Jet Impingement,' J. of SAREK, Vol. 13, pp.73-79
  3. Viskanta, R., 1993, 'Heat Transfer to Impinging Isothermal Gas and Flame Jets,' Exp. Thermal and Fluid Sci., Vol. 6, pp.111-134 https://doi.org/10.1016/0894-1777(93)90022-B
  4. Martin, H., 1977, 'Heat and Mass Transfer between Impinging Gas Jet and Solid Surface,' Advances in Heat Transfer, Vol. 13, pp 1-60 https://doi.org/10.1016/S0065-2717(08)70221-1
  5. Hansen, L. G. and Webb, B. W., 1993, 'Air Jet Impingement Heat Transfer from Modified Surface,' Int. J. Heat Mass Transfer, Vol. 36, pp.989-997 https://doi.org/10.1016/S0017-9310(05)80283-2
  6. Webb, R. L., 1994, 'Principles of Enhanced Heat Transfer,' John Wiley & Sons, Inc.
  7. Paek, J. W., Kang, B. H, Kim, S. Y. and Hyun, J. M., 2000, 'Effective Thermal Conductivity and Permeability of Aluminum Foam Material,' Int. J. Thermophysics, Vol. 21, pp.453-464 https://doi.org/10.1023/A:1006643815323
  8. Kim, S. Y., Paek, J. W. and Kang, B. H., 2000, 'Flow and Heat Transfer Correlations for Porous Fin in a Plate-Fin Heat Exchanger,' Trans. ASME J. Heat Transfer, Vol. 122, pp.572-578 https://doi.org/10.1115/1.1287170
  9. Lee, M. H., Paek, J. W., Kim, S. Y. and Lee, K. S., 2001, 'Heat Transfer from a Fan-Aluminum Foam Heat Sink Assembly for CPU Cooling,' Proc. of the Korea Thermal Engineering Conf. Spring 2001, pp.101-106
  10. Figliola, R. S. and Beasley, D. E., 1995, 'Theory and Design for Mechanical Measurements,' John Wiley and Sons, New York
  11. Huber, A. M. and Viskanta, R., 1994, 'Effect of Jet-Jet Spacing on Convective Heat Transfer to Confined, Impinging Arrays of Axisymmetric Air Jets,' Int. J. Heat Mass Transfer, Vol. 37, pp.2859-2869 https://doi.org/10.1016/0017-9310(94)90340-9
  12. San, J. Y. and Lai, M. D., 2001, 'Optimum Jet-to-Jet Spacing of Heat Transfer for Staggered Arrays of Impinging Air Jets,' Int. J. Heat Mass Transfer, Vol. 44, pp.3997-4007 https://doi.org/10.1016/S0017-9310(01)00043-6
  13. Incropera, F. P., 1999, 'Liquid Cooling of Electronic Devices by Single-Phase Convection,' John Wiley and Sons, New York
  14. Gardon, R., and Akfirat, J. C, 1965, 'The Role of Turbulence in Determining the Heat Transfer Characteristics of Impinging Jets,' Int. J. Heat Mass Transfer, Vol. 8, pp.1261-1272 https://doi.org/10.1016/0017-9310(65)90054-2