설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제8권1호
  • /
  • Pages.88-98
  • /
  • 1996
  • /
  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

왕복유동에서 재생기 특성 및 열전달에 관한 수치해석

A Numerical Study on the Regenerator Preformance and Heat Transfer in Oscillating Flow

  • 이건태 (한국과학기술원, 공조 환경제어 연구실) ;
  • 강병하 (한국과학기술원, 공조 환경제어 연구실) ;
  • 이재헌 (한양대학교 기계공학과)
  • 발행 : 1996.02.01
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초록

The present study is concerned with the flow friction and heat transfer characteristics of the combination of various regenerator materials, using the different Darcy number and porosity, which is filled uniformly and partially in a tube under oscillating flow condition. The poros medium is adopted as Brinkmann-Forschheimer extended Darcy model. Numerical results are obtained or the flow and temperature fields and described the effect of the combination of various regenerator materials and Womersley number on the pressure drop, the heat transfer and the regenerator efficiency. The results obtained indicate that not only heat transfer between the tube wall and oscillating flow but also the pressure drop at both ends of the regenerator are increased, while the regenerator efficiency is decreased in the increase of womersley number. It is also found that the friction factor is increased as Reynolds number is increased. The comparison between the combination of the various regenerator materials and the homogeneous regenerator material shows that the regenerator efficiency can be enhanced with the proper combination of various regenerator materials even though the averaged porosity of the regenerator is same.

키워드

참고문헌

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