Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Numerical analysis of heat transfer and friction factors in a duct having circular perforated baffles

원형 다공배플이 있는 덕트에서의 열전달과 마찰계수에 관한 수치해석

  • Oh, S.K. (Department of Mechanical Engineering, Gyeongsang National University) ;
  • Ahn, S.W. (Department of Mechanical Engineering, Gyeongsang National University) ;
  • Ary, Bachtiar Krishna Putra (Mechanical Engineering, Sepuluh Nopember Institute of Technology) ;
  • Bae, S.T. (Korea Institute of Industrial Technology)
  • 오세경 (경상대학교 기계시스템공학과) ;
  • 안수환 (경상대학교 기계시스템공학과) ;
  • ;
  • 배성택 (한국생산기술연구소 연구원)
  • Received : 2012.03.30
  • Accepted : 2012.05.30
  • Published : 2012.08.31
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Abstract

The present numerical study was performed to determine how the two perforated baffles( Inclined angle=$5^{\circ}$; perforation diameter=2cm) placed at a rectangular duct affect heat transfer and associated friction factors. The parametric effects of perforated baffles(3, 6 and 12 holes) and flow Reynolds number ranging from 28,900 to 61,000 on the heated target surface are explored. As for the investigation of heat transfer behaviours on the local Nusselt number with two baffles placed at $x/D_h=0.8$ and $x/D_h=0.8$ of the edge baffles, it is evident that the average Nusselt number increases with increasing number of holes, but the friction factor decreases with an increase in the hole number placed at baffles. The numerical results by commercial code CFX 10.0 are confirmed with the experimental data.

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References

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