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논문 상세정보

희박 분무영역에서의 분무냉각 막 비등 열전달에 관한 연구

Study on Film Boiling Heat Transfer of Spray Cooling in Dilute Spray Region

Abstract

This study presents experimental results on the heat transfer coefficients in the film boiling region of spray cooling for actual metallurgical process. In this study, the heat flux distributions of a two dimensional dilute spray impinging on a hot plate were experimentally investigated. A stainless steel block was cooled down from intial temperature of about $800^{\circ}C$ by twin fluid (air-water) flat spray. It was found from the experimental results that the heat transfer area was classified into the stagnation region and wall-flow region. In the stagnation region, the experimental data of local heat transfer coefficient was closely correlated with the local droplet-flow-rate supplied from the spray nozzle directly. Thus, the local heat transfer coefficients are in good agreement with the predicted values from the correlations proposed by our previous study. In wall-flow region, however, remarkable differences are observed between experimental data and predicted values because the number of rebound droplets increase with increasing the distance from the stagnation point.

저자의 다른 논문

참고문헌 (11)

  1. 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, No. 574, pp.2158-2164 
  2. 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, No. 594, pp.734-739 
  3. 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, No. 597, pp. 1991-1997 
  4. 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 
  5. 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 
  6. 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 
  7. Ito, T., Takata, T. and Liu, Z. H., 1989, 'On the Water Cooling on Hot Surface,' Trans. of JSME, Vol. 55, No. 511, pp. 805-813 
  8. 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 
  9. Bolle, L. and Moureau, J. C., 1978, Multiphase Science and Technical, Vol. 1, Hemisphere Pub. Co. 
  10. Lee, P. J., Jin, S. T. and Lee, S. H., 2004, 'A Study on Cooling of Hot Steel Surface by Water-Air Mixed Spray,' Trans. of the KSME(B), Vol. 28, No.3, pp. 247-255 
  11. Beck, J. V., 1970, 'Nonlinear Estimation Applied to the Nonlinear Inverse Heat Conduction Problem,' Int. J. Heat & Mass Transfer, Vol. 13, pp. 703-716 

이 논문을 인용한 문헌 (2)

  1. Kim, Yeung-Chan ; Yun, Seung-Min 2006. "Study on Film Boiling Heat Transfer of Spray Cooling in Air-Water Full Cone Spray System" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 30(12): 1236~1242 
  2. Yun, Seung-Min ; Kim, Yeung-Chan 2007. "Study on Correlation of Droplet Flow Rate and Film Boiling Heat Transfer in Spray Cooling" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 31(4): 335~340 

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