Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Heat Transfer and Total Friction Factors in the Convergent Channels with V/⋀-shaped Ribs on Two Opposite Walls

양 벽면에 V/⋀형 리브가 있는 수축 채널의 열전달과 전 마찰계수

  • Lee, Myung-Sung (Gyeongnam Institute for Regional Program Evaluation) ;
  • Heo, Meo-Seong (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Jeong, Ui-Jae (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Park, Young-Joon (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Yoo, Jung-Hyun (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Im, Gun-Woo (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Ahn, Soo-Whan (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University)
  • 이명성 (경남지역사업평가단) ;
  • 허민성 (경상대학교 해양산업 연구소 기계시스템공학과) ;
  • 정의재 (경상대학교 해양산업 연구소 기계시스템공학과) ;
  • 박영준 (경상대학교 해양산업 연구소 기계시스템공학과) ;
  • 유정현 (경상대학교 해양산업 연구소 기계시스템공학과) ;
  • 임건우 (경상대학교 해양산업 연구소 기계시스템공학과) ;
  • 안수환 (경상대학교 해양산업 연구소 기계시스템공학과)
  • Received : 2016.07.18
  • Accepted : 2016.09.27
  • Published : 2016.10.31
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Abstract

The measurements of heat transfer and total friction factors for turbulent flows in the convergent rectangular channels with two opposite in-line ribbed walls are reported. The study has covered three different angled ribs ($30^{\circ}$, $45^{\circ}$ and $60^{\circ}$) and Reynolds number in the range of 22,000 to 75,000. The channel, composing of ten isolated copper sections in the length of test section of 1 m, has the channel convergence ratio of $D_{ho}/D_{hi}=0.67$. The results show that the ribs pointing downstream (${\wedge}-shaped$) is somewhat greater than the ribs pointing upstream (V-shaped) in the dimensionless Nusselt number and total friction factors.

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References

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