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

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

DOI QR Code

Study on Film Boiling Heat Transfer of Spray Cooling in Air-Water Full Cone Spray System

물-공기 원추형 분무시스템에 있어서 분무냉각 막비등 열전달에 관한 연구

  • 김영찬 (안동대학교 기계공학부) ;
  • 윤승민 (안동대학교 대학원 기계공학부)
  • Published : 2006.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The local heat flux of spray cooling in the film boiling region were experimentally investigated for the spray region of $D_{max}$ = $0.005{\sim}0.03m^3/(m^2s)$. A twin-fluid full cone spray nozzle was employed for the experiment and the distributions of droplet flow rates were obtained for air-water full cone sprays. A stainless steel block was cooled down from initial temperature of about $800^{\circ}C$ by full cone spray. In the region near the stagnation point, it was found that the experimental data are in good agreement with the results predicted from the correlations between the local heat transfer and the local droplet flow rate proposed in the previous report. However, it was found that the experimental data of $D_r$ > $0.01m^3/(m^2s)$ are a little smaller than the results predicted from the correlations.

Keywords

References

  1. Toda, S., 1972, 'A Study of Mist Cooling (1st Report : Investigation of Mist Cooling),' Heat Transfer Japanese Research, Vol. 1, pp. 39-52
  2. Toda, S., 1974, 'A Study of Mist Cooling (2nd Report : Theory of Mist Cooling and its Fundamental Experiments),' Heat Transfer Japanese Research, Vol. 3, pp. 1-44
  3. Bolle, L. and Moureau, J. C., 1977, 'Spray Cooling of Hot Surface,' Two-Phase Flow and Heat Transfer Proc. NATO Advanced Study Institude, Vol. 3, pp. 1327-1346
  4. Ito, T., Takata, T. and Liu, Z. H., 1989, 'Study on the Water Cooling of Hot Surface,' Trans. of JSME, Vol.55-511, pp. 805-813
  5. Ohkubo, H. and Nishio, S., 1993, 'Study on Mist Cooling for Heat Treatment of Metals,' J. Materials Processing & Manufacturing Science, Vol. 2, pp. 14-27
  6. Bemadin, J. D. and Mudawar, I., 1997, 'Film Boiling Heat Transfer of Droplet Streams and Sprays,' Int. J. of Heat & Mass Transfer, Vol. ？40, pp. 2579-2593 https://doi.org/10.1016/S0017-9310(96)00297-9
  7. Kim, Y. C., Nishio, S. and Ohkubo, H., 1994, 'Spray Cooling with Formation of Liquid Film Flow: Distribution of Heat Transfer Coefficient in High Temperature Region,' Trans. of the JSME, Vol. 60-574, pp.2158-2164
  8. Kim, Y. C., 2005, 'Study on Film Boiling Heat Transfer of Spray Cooling in Dilute Spray Region,' Trans. of the KSME(B), Vol. 29, No. 2, pp. 279-286 https://doi.org/10.3795/KSME-B.2005.29.2.279
  9. Kim, Y. C., Nishio, S. and Ohkubo, H., 1995, 'Spray Cooling with Formation of Liquid Film : Film Boiling Heat Transfer of Liquid Flim Flow,' Trans. of the JSME, Vol. 62-594, pp.734-739
  10. Kim, Y. C., Nishio, S. and Ohkubo, H., 1996, 'Heat Transfer in High Temperature Region of Spray Cooling Interacting with Liquid Film Flow,' Trans. of the JSME, Vol. 62-597, pp. 1991-1997
  11. Kim, Y. C., 2001, 'Study on Minimum Heat ？Flux Point in Spray Cooling of Hot Plate,' Proceeding of the KSME 2001 Spring Annual Meeding D, pp. 175-180
  12. Kim, Y. C., 2001, 'Experimental Study on Minimum Heat Flux Point of Liquid Film Flow,' Proceeding of the KSME 2001 Spring Annual Meeding D, pp. 208-213
  13. Nishio, S. and Kim, Y. C., 1998, 'Heat Transfer of Dilute Spray Impinging on Hot Surface,' Int. J. of Heat & Mass Transfer, Vol. 41, pp.4113-4119 https://doi.org/10.1016/S0017-9310(98)00150-1
  14. Kim, Y. C., 2005, 'Film Boiling Heat Transfer Model of Spray Cooling Focusing on Rebound Motion of Droplets,' Trans. of the KSME(B), Vol. 29, No.2, pp. 287-293 https://doi.org/10.3795/KSME-B.2005.29.2.287
  15. Beck, J. V., 1970, 'Nonlinear Estimation Applied to the Nonlinear Inverse Heat Conduction Problem,' Int. J. Heat & Mass Transfer, Vol. 13, pp. 703-716 https://doi.org/10.1016/0017-9310(70)90044-X