HEAT TRANSFER UNDER A PULSED SLOT TURBULENT IMPINGING JET AT LARGE TEMPERATURE DIFFERENCES

Abstract

Pulsed impinging jets have received increasing interest for their potential in heat and mass transfer enhancement. However, published results on effects of pulsations under different flow and geometrical parameters have shown conflicting results. To further understand the flow and thermal processes in pulsed impinging jets, a numerical investigation has been performed on a two dimensional pulsed turbulent impinging jet under large temperature differences between the jet flow and the impinging surface to examine the effect of temperature-dependent thermophysical properties along with pulsation of the jet on the local Nusselt number distribution on the target surface. The numerical results show that the local time-averaged Nusselt numbers calculated with various thermal property values at the jet, film and impingement surface temperatures differ significantly for large temperature difference cases (>100 K). A parametric study for both heating and cooling cases indicates that no obvious enhancement by single sinusoidal pulsation can be found under current conditions except for cases with large temperature differences at distances far from stagnation point, i. e. in the wall jet region.

Keywords

Dates

  • Submission Date2009-08-28
  • Revision Date2009-09-09
  • Acceptance Date2009-09-09

DOI Reference

10.2298/TSCI1001271X

References

  1. Martin, H., Heat and Mass Transfer between Impinging Gas Jets and Solid Surface, in Advances in: Heat Transfer, Vol. 13 (Eds. J. P. Hartnett, T. F. Irvine, Jr.), Academic Press, New York, 1977, pp. 1-60
  2. Polat, S., Heat and Mass Transfer in Impingement Drying, Drying Technology, 11 (1993), 6, pp. 1147-1176
  3. Lienhard, V. J. H., Liquid Jet Impingement, in: Annual Review of Heat Transfer, Vol. 6 (Ed. C. L. Tien), Begell Hourse, New York, USA,1995, pp. 199-270
  4. Mujumdar, A. S., Impingement Drying, in: Handbook of Industrial Drying, 3rd ed. (Ed. A. S. Mujumdar), Taylor & Francis Group, New York, USA, 2007, pp. 385-395
  5. Kataoka, K., Suguro, M., The Effect of Surface Renewal Due to Large Scale Eddies on Jet Impingement Heat Transfer, International Journal of Heat and Mass Transfer, 30 (1987), 3, pp. 559-567
  6. Zumbrunnen, D. A., Aziz, M., Convective Heat Transfer Enhancement Due to Intermittency in an Impinging Jet, Journal of Heat Transfer, 115 (1993), 1, pp. 91-98
  7. Eibeck, R. A., et al., Pulse Combustion-Impinging Jet Heat-Transfer Enhancement, Combustion Science and Technology, 94 (1993), 1, pp. 147-165
  8. Zumbrunnen, D. A., Balasubramanian, M., Convective Heat Transfer Enhancement Due to Gas Injection into an Impinging Liquid Jet, Journal of Heat Transfer, 117 (1995), 4, pp. 1011-1017
  9. Mladin, E. C., Zumbrunnen, D. A., Local Convective Heat Transfer to Submerged Pulsating Jets, International Journal of Heat and Mass Transfer, 40 (1997), 14, pp. 3305-3321
  10. Sailor, D. J., Rohli, D. J., Fu, Q. L., Effect of Variable Duty Cycle Flow Pulsations on Heat Transfer Enhancement for an Impinging Air Jet, International Journal of Heat and Fluid Flow, 20 (1999), 6, pp. 574-580
  11. Camci, C., Herr, F., Forced Convection Heat Transfer Enhancement Using a Self-Oscillating Impinging Planar Jet, Journal of Heat Transfer, 124 (2002), 4, pp. 770-782
  12. Zulkifli, R., Sopian, K. K., Studies on Pulse Jet Impingement Heat Transfer: Flow Profile and Effect of Pulse Frequencies on Heat Transfer, International Journal of Engineering and Technology, 4 (2007), 1, pp. 86-94
  13. Zulkifli, R., et al., Comparison of Local Nusselt Number for Steady and Pulsating Circular Jet at Reynolds Number of 16000, European Journal of Scientific Research, 29 (2009), 3, pp. 369-378
  14. Haneda, Y., et al., Enhancement of Impinging Jet Heat Transfer by Making Use of Mechano-Fluid Interactive Flow Oscillation, International Journal of Heat Fluid flow, 19 (1998), 2, pp. 115-124
  15. Chaniotis, A.K., Poulikakos, D., Ventkos, Y., Dual Pulsating or Steady Slot Jet Cooling of a Constant Heat Flux Surface, ASME Journal of Heat Transfer, 125 (2003), 4, pp. 575-586
  16. Bejera, R.C., Dutta, P., Srinivasan, K., Numerical Study of Interrupted Impinging Jets for Cooling of Electronics, IEEE Transactions on Components and Packaging Technologies, 30 (2007), 2, pp. 275-284
  17. Poh, H. J.. Kumar, K., Mujumdar, A. S., Heat Transfer from a Pulsed Laminar Impinging Jet, International Communication for Heat & Mass Transfer, 32 (2005), 10, pp. 1317-1324
  18. Poh, H. J., Mujumdar, A. S., Heat Transfer from a Pulsed Turbulent Impinging Jet at Large Temperature Differences, Proceedings, 5th Asia-Pacific Drying Conference, Hong Kong, 2007, pp. 1171-1177
  19. Fallen, M., Heat Transfer in a Pipe with Superimposed Pulsating Flow, Heat and Mass Transfer, 16 (1982), 2, pp. 89-99
  20. Sheriff, H. S., Zumbrunnen, D. A., Effect of Flow Pulsations on the Cooling Effectiveness of an Impinging Jet, Journal of Heat Transfer, 116 (1994), 4, pp. 886-895
  21. Azevedo, L. F. A., Webb, B. W., Queiroz, M., Pulsed Air-jet Impingement Heat-Transfer, Experimental Thermal and Fluid Science, 8 (1994), 3, pp. 206-213
  22. Mladin, E. C., Zumbrunnen, D. A., Nonlinear Dynamics of Laminar Boundary Layers in Pulsatile Stagnation Flows, Journal of Thermophysics and Heat Transfer, 8 (1994), 32, pp. 514-523
  23. Mladin, E. C., Zumbrunnen, D. A., Alterations to Coherent Flow Structures and Heat Transfer Due to Pulsations in an Impinging Air-Jet, International Journal of Thermal Science, 39 (2000), 2, pp. 236-248
  24. Vejrazka, J., Experimental Study of a Pulsating Round Impinging Jet, Ph. D. thesis, Institut National Polytechnique de Grenoble, Grenoble, France, 2002
  25. Mladin, E. C., Zumbrunnen, D. A., Dependence of Heat Transfer to a Pulsating Stagnation Flow on Pulse Characteristics, Journal of Thermophysics and Heat Transfer, 9 (1995), 1, pp. 181-192
  26. Hofmann, H. M., et al., Influence of a Pulsation on Heat Transfer and Flow Structure in Submerged Impinging Jets, International Journal of Heat and Mass Transfer, 50 (2007), 17-18, pp. 3638-3648
  27. Wang, S. J., Mujumdar, A. S., A Comparative Study of Five Low Reynolds Number k-e Models for Impingement Heat Transfer, Applied Thermal Engineering, 25 (2005), 1, pp. 31-44
  28. Fujimoto, H., et al., Numerical Simulation of Transient Cooling of a Hot Solid by an Impinging Free Surface Jet, Numerical Heat Transfer, Part A: Applications, 36 (1999), 8, pp. 767-780
  29. Morris, G. K., Garimella, S. V., Fitzgerald, J. A., Flow-Field Prediction in Submerged and Confined Jet Impingement Using the Reynold Stress Model, Journal of Electronic Packaging, 121 (1999), 4, pp. 255-262
  30. Shi, Y. L., Ray, M. B., Mujumdar, A. S., Computational Study of Impingement Heat Transfer under a Turbulent Slot Jet, Industrial and Engineering Chemistry Research, 41 (2001), 18, pp. 4643-4651
  31. Behnia, M., et al., Numerical Study of Turbulent Heat Transfer in Confined and Unconfined Impinging Jets, International Journal of Heat and Fluid Flow, 20 (1999), 1, pp. 1-9
  32. Shi, Y. L., Ray, M. B., Mujumdar, A. S., Effect of Large Temperature Differences on Local Nusselt Number under Turbulent Slot Impingement Jet, Drying Technology, 20 (2002), 9, pp. 1803-1825
Volume 14, Issue 1, Pages271 -281