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

  • 제27권4호
  • /
  • Pages.511-517
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  • 2003
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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평판에 분사된 분무충돌제트의 냉각특성에 대한 실험적 연구

An Experimental Study on Cooling Characteristics of Mist Impinging Jet on a Flat Plate

  • 전상욱 (서울대학교 대학원 기계항공공학부) ;
  • 정원석 (서울대학교 대학원 기계항공공학부) ;
  • 이준식 (서울대학교 기계항공공학부)
  • 발행 : 2003.04.01
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초록

An experiment is conducted to investigate the effect of air and water mass flow rates on cooling characteristics of mist impinging jet on a flat plate. The air mass flow rate ranges from 0.0 to 3.0 g/s, and water mass flow rates from 5.0 to 20.0 g/s. An air-atomizing nozzle is used fur the purpose of controlling air and water mass flow rates. The test section is designed distinctively from previous works to obtain local heat transfer coefficient distributions. Heat transfer characteristics of the mist impinging jet are explained with the aid of flow visualization. Surface temperature and heat transfer coefficient distributions become more uniform as air mass flow rate increases. The water flow rate provides substantial contribution to enhancement of cooling performance. On the other hand, The air mass flow rate weakly influences the averaged heat transfer rate when the water mass flow rate is low, but the averaged heat transfer rate Increases remarkably with the air mass flow rate in case of the high water mass flow rate.

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참고문헌

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