Browse > Article
http://dx.doi.org/10.3795/KSME-B.2004.28.1.118

Flow and Heat Transfer Characteristics of Impinging Single Circular Swirl Jet on Flat Plate  

Jang, Jong-Chul (영남대학교 대학원 기계공학과)
Jeon, Young-Woo (영남대학교 대학원 기계공학과)
Park, Si-Woo (영남대학교 기계기술연구소)
Chung, In-Kee (영남대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.1, 2004 , pp. 118-125 More about this Journal
Abstract
The experimental study on flow and heat transfer characteristics was conducted to investigate and to compare the performance of swirl jet by a twisted tape as a swirl generator with the performance of impinging single circular jet in fully developed flow tube. The effects of jet Reynolds number(Re=8700, 13800, 20000, 26500), dimensionless distance of nozzle-to-plate(H/d=2, 4, 6, 8) and swirl ratio(S=0.11, 0.23, 0.30) of the jet on the local and average Nusselt number have been examined. Measurements of local heat transfer rate and flow patterns on the jet impinging plate were used naphthalene sublimation technique and flow visualization technique respectively. Mean velocity and turbulence intensity of the jet along the centerline were measured. With a twisted tape in the nozzle exit, average Nusselt number at the around area of stagnation point were higher than those without the twisted tape at H/d=2, 4 and with the increase of Reynolds number. With a twisted tape in the nozzle, in the case of H/d=2, Re=26500 and S=0.11, maximum local Nusselt number at the region of y/d=0 and x/d=0.44 was obtained.
Keywords
Swirl Generator; Jet Impingement Heat Transfer; Circular Jet; Naphthalene Sublimation Technique; Flow Visualization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ambrose, D., Lawrenson, I. J. and Sprake, C. H. S., 1975, 'The Vapour Pressure of Naphthalene,' J. Chem. Thermodynamics, Vol. 7, pp. 1173-1176   DOI
2 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   DOI   ScienceOn
3 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   DOI   ScienceOn
4 Ward, J. and Mahmood, M., 1982, 'Heat Transfer from a Turbulent, Swirling, Impinging Jet,' Proc. 7th Int. Heat Transfer Conf., HTD-3, pp. 401-407
5 Lee, D. H. and Won, S. Y., 1999, 'Turbulent Heat Transfer from a Flat Surface to a Swirling Round Impinging Jet,' Proceeding of KSME Thermal Technical Division Conference, pp. 154-160
6 Bach, T. V. and Gouldin, F. C., 1982, 'Flow Measurements in a Model Swirl Combustor,' J. of AIM, Vol. 20, No.5, pp. 642-651
7 Huang, L. and El-Genk, M. S., 1997, 'Heat Transfer and Flow Visualization Experiments of Swirling, Multi-channel and Conventional Impinging Jets,' Int. J. Heat Mass Transfer, Vol. 41, No.3, pp. 583-600   DOI   ScienceOn
8 Jambunathan, K., Lai, E. Moss, M. A. and Button, B. L., 1992, 'A Review of Heat Transfer Data for Single Circular Jet Impingement,' Int. J. Heat and Fluid Flow, Vol. 13, No.2, pp. 106-115   DOI   ScienceOn
9 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
10 Wolf, D. H., Viskanta, 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   DOI   ScienceOn
11 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   DOI   ScienceOn