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

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Bleed Flow and Angled Ribs on Heat Transfer Distributions in a Rotating Square Channel

유출유동 및 각도진 요철이 회전하는 사각덕트 내 열전달분포에 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 square channel with $45^{\circ}$ rib turbulators. 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 bleed 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, decrement of main flow rate, secondary flow by angled ribs and bleed hole location. As the bleed ratio (BR) increased, the heat/mass transfer decreased on both surfaces due to the reduction of main flow rate. With increment of the rotation number, heat/mass transfer also decreased and almost the same because the reattachment of the secondary flow induced by angled ribs was weakened on the leading surface and the secondary flow was disturbed on the trailing surface by the Coriolis force.

Keywords

References

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Cited by

  1. vol.11, pp.1, 2008, https://doi.org/10.5293/KFMA.2008.11.1.089
  2. Optimization of Angled Ribs for Heat Transfer Enhancement in a Square Channel with Bleed Flow vol.32, pp.4, 2008, https://doi.org/10.3795/KSME-B.2008.32.4.300