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

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Channel Rotation and Bleed Flow on Heat/Mass Transfer Characteristics in a 90° Ribbed Square Channel

채널회전 및 유출유동이 90도 요철이 설치된 사각채널 내 열/물질전달 특성에 미치는 영향

  • 박석환 (연세대학교 대학원 기계공학과) ;
  • 전윤흥 (연세대학교 대학원 기계공학과) ;
  • 김경민 (연세대학교 대학원 기계공학과) ;
  • 이동현 (연세대학교 대학원 기계공학과) ;
  • 조형희 (연세대학교 기계공학부)
  • Published : 2007.01.01
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Abstract

The present study investigated the effects of channel rotation and bleed flow on heat/mass transfer in a $90^{\circ}$ ribbed square channel. The bleed holes were located between the rib turbulators on the leading surface and those on the trailing surface case by case. The tests were conducted under the conditions of various bleeding ratios (0.0, 0.2, 0.4) and rotation numbers (0.0, 0.2, 0.4) at Re=10,000. The results suggested that heat/mass transfer characteristics were influenced by the Coriolis force, bleed flow and bleed hole location. The heat/mass transfer on the surface with bleed flow was more increased than that without bleed flow but that on the opposition surface was decreased. Those were due to the effects of the tripping flow and the diminution of main flow rate respectively. The results also showed that the heat/mass transfer characteristics were different according to bleed hole location and channel rotation.

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References

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