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Study on the Jet Impingement Heat Transfer Characteristics at Protruding heated Blocks
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 Title & Authors
Study on the Jet Impingement Heat Transfer Characteristics at Protruding heated Blocks
Jeong, In-Gi; Park, Si-U; Park, Su-Cheol;
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 Abstract
An experimental investigation on heat transfer characteristics of two-dimensional heated blocks using a confined impinging slot jet has been performed. The effect of jet Reynolds number(Re=3900, 5800, 9700), streamwise block spacing(p/w=0.5, 1, 1.5) and dimensionless nozzle to block distance(H/B=1, 2, 4, 6) have been examined with five isothermally heated blocks. With the measurement of jet mean velocity and turbulence intensity distributions at nozzle exit, initially turbulent regimes, are classified. To clarify local heat transfer characteristics, naphthalene sublimation technique as used. The maximum Nusselt number at the stagnation point for the jet Reynolds number is occurred at H/B=4. Besides, the local and a average heat transfer of heated blocks increase with decreasing streamwise block spacing and increasing jet Reynolds number.
 Keywords
Confined Slot Jet;Jet Impingement Heat Transfer;Heated Block;Naphthalene Sublimation Technique;
 Language
Korean
 Cited by
 References
1.
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. 1261-1271 crossref(new window)

2.
Gardon, R. and Akfirat, J. C., 1996, 'Heat Transfer Characteristics of Impinging Two-Dimensional Air Jets,' ASME J. of Heat Transfer, pp. 101-108

3.
Wolf, D. H., Viskanata, R. and Incropera, F. P., 1995, 'Turbulence Dissipation in a Free-Surface Jet of Water and its Effect on Local Impingement Heat Transfer from a Heated Surface : Part 2 - Local heat transfer,' ASME J. of Heat Transfer, Vol. 117, pp. 95-103

4.
윤순현, 김동건, 1999, '노즐 형상에 따른 충돌제트에 열전달 특성,' 대한기계학회논문집 B권, 제23권, 제12호, pp. 1562-1569

5.
Obot, N., Mujumdar, A. and Douglas, W., 1982, 'Effect of Semi-Confinement on Impinging Heat Transfer,' Proc. 7th Int. Heat Transfer Conf. Vol. 3, pp. 395-400

6.
Wadsworth, D. C. and Mudawar, I., 1990, 'Cooling of a Multichip Electronic Module by Means of Confined two Dimensional Jets of Dieletronic Liquid,' ASME J. of Heat Transfer, Vol. 112, pp. 891-898

7.
Hung, Y. H. and Lin, P. Y., 1997, 'Cooling Performance of Slot Jet Impinging onto a Simulated Multi-chip Module,' Advances in Electronic Packaging, Vol. 2, pp. 1795-1801

8.
Schafer, D. M., Ramadhyani, S. and Incropera, F. P., 1992, 'Numerical Simulation of Laminar Convection Heat Transfer from an In-line Array of Discrete Sources to a Confined Rectangular Jet,' Numerical Heat Transfer, Part A, Vol. 22, pp. 121-141 crossref(new window)

9.
Parneix, S., Behnia, M. and Durbin, P. A., 1999, 'Predictions of Turbulent Heat Transfer in an Axisymmetric Jet Impinging on a Heated Pedestal,' ASME J. of Heat Transfer, Vol. 121, pp. 43-49

10.
김원태, 최성봉, 노홍구, 김광수, 1992, '전자 장비의 분사공기에 의한 냉각특성에 관한 연구,' 대한기계학회 1992년도 추계학술대회논문집(II), pp. 134-137

11.
Ambrose, D., Lawrenson, I. J. and Sprake, C. H. S., 1975, 'The Vapour Pressure of Naphtalene,' J. Chem. Thermodynamics, Vol. 7, pp. 1173-1176

12.
Cho, K., Irvine, T. F. J. and Karani, J., 1992, 'Measurement of the Diffusion Coefficient of Naphthalene into Air,' Int. J. Heat Mass Transfer, Vol. 35, No. 4, pp. 957-966

13.
Goldstein, R. J. and Cho, H. H. 1995, 'A Review of Mass Transfer Measurements Using Naphthalene Sublimation,' Experimental Thermal and Fluid Science, Vol. 10, pp. 416-434 crossref(new window)

14.
Kline, S. J.and McClintock, F. A., 1953, 'Descrbing Uncertainties in Single Sample Experiments,' Mech. Eng., Vol. 75, pp. 3-8