Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on Combined Heat Transfer in a Enclosure with a Block

밀폐공간내의 피가열체 존재시 복합열전달에 관한 연구

  • Hong, Seong-Kook (Department of Mechanical Engineering, ChungAng University) ;
  • Ryou, Hong-Sun (Department of Mechanical Engineering, ChungAng University) ;
  • Hong, Ki-Bae (Department Thermal Engineering, ChungJu University) ;
  • Chae, Soo (Department of Automobile, Koon Jang College)
  • 홍성국 (중앙대학교 기계공학과) ;
  • 유홍선 (중앙대학교 기계공학과) ;
  • 홍기배 (충주대학교 열공학과) ;
  • 채수 (군장대학 자동차 시험과)
  • Published : 2000.03.01
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Abstract

This paper numerically deals with combined heat transfer in a enclosure with a block. The block affected by hot wall is located centrally in the enclosure with a radiating gray gas. The discrete ordinate method(DOM) was used for solving the radiative transfer equation. Both laminar and turbulent cases were investigated for various Rayleigh number and standard k-$\varepsilon$ model was adopted to turbulent case. The effects of optical thickness, wall emissivity and fluid-solid thermal conductivity ratio are investigated on the flow and temperature fields. This study shows that as the wall emissivity decreases, the temperature distribution gradually becomes uniform and the heat transfer is reduced in enclosure. It is expected that this study can help to design the energy system related to the combined heat transfer and operate it safely.

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