Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Cooling Water Temperature on Heat Transfer Characteristics of Water Impinging Jet

냉각수 온도에 따른 수분류 충돌제트의 열전달 특성 연구

  • Lee, Jungho (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials (KIMM)) ;
  • Yu, Cheong-Hwan (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials (KIMM)) ;
  • Do, Kyu Hyung (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials (KIMM))
  • 이정호 (한국기계연구원 그린환경에너지기계연구본부) ;
  • 유청환 (한국기계연구원 그린환경에너지기계연구본부) ;
  • 도규형 (한국기계연구원 그린환경에너지기계연구본부)
  • Received : 2010.07.27
  • Accepted : 2010.09.10
  • Published : 2010.09.30
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Abstract

Water jet impingement cooling has been widely used in a various engineering applications; especially in cooling of hot steel plate of steelmaking processes and heat treatment in hot metals as an effective method of removing high heat flux. The effects of cooling water temperature on water jet impingement cooling are primarily investigated for hot steel plate cooling applications in this study. The local heat flux measurements are introduced by a novel experimental technique that has a function of high-temperature heat flux gauge in which test block assemblies are used to measure the heat flux distribution during water jet impingement cooling. The experiments are performed at fixed flow rate and fixed nozzle-to-target spacing. The results show that effects of cooling water temperature on the characteristics of jet impingement heat transfer are presented for five different water temperatures ranged from 5 to $45^{\circ}C$. The local heat flux curves and heat transfer coefficients are also provided with respect to different boiling regimes.

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References

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