Numerical analysis of heat transfer and friction factors in a duct having circular perforated baffles
원형 다공배플이 있는 덕트에서의 열전달과 마찰계수에 관한 수치해석

S.K. Oh, S.W. Ahn, Bachtiar Krishna Putra Ary, S.T. Bae
2012 Journal of the Korea Society For Power System Engineering  
Abstract:The present numerical study was performed to determine how the two perforated baffles( Inclined angle=5°; 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  
more » ... les placed at   0.8 and   8.0 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.
doi:10.9726/kspse.2012.16.4.044 fatcat:mkugiugtqraebnpn4nmzzfew4q