Numerical simulation of heat transfer and flow of cooling air in triangular wavy fin channels  

作　　者：倪明龙 陈亚平 董聪 吴嘉峰 

机构地区：[1]School of Energy and Environment,Southeast University [2]Jiangsu Electric Power Design Institute

出　　处：《Journal of Central South University》2014年第7期2759-2765,共7页中南大学学报（英文版）

基　　金：Project(50976022) supported by the National Natural Science Foundation of China;Project(BY2011155) supported by the Provincial Science and Technology Innovation and Transformation of Achievements of Special Fund Project of Jiangsu Province,China

摘　　要：Numerical computation models of air cooling heat transfer and flow behaviors in triangular wavy fin channels(TWFC) were established with structural parameters of fins considered.The air side properties of heat transfer coefficient and pressure drop are displayed with variable structural parameters of fins and inlet velocities of cooling air.Within the range of simulation,TWFC has the best comprehensive performance when inlet velocity vin=4-10 m/s.Compared with those of straight fins,the simulation results reveal that the triangular wavy fin channels are of higher heat transfer performances especially with the fin structural parameters of fin-height Fh=9.0 mm,fin-pitch Fp=2.5-3.0 mm,fin-wavelength λ=14.0-17.5 mm and fin-wave-amplitude A=1.0-1.2 mm.The correlations of both heat transfer factor and friction factor are presented,and the deviations from the experimental measurements are within 20%.Numerical computation models of air cooling heat transfer and flow behaviors in triangular wavy fin channels（TWFC） were established with structural parameters of fins considered.The air side properties of heat transfer coefficient and pressure drop are displayed with variable structural parameters of fins and inlet velocities of cooling air.Within the range of simulation,TWFC has the best comprehensive performance when inlet velocity vin=4-10 m/s.Compared with those of straight fins,the simulation results reveal that the triangular wavy fin channels are of higher heat transfer performances especially with the fin structural parameters of fin-height Fh=9.0 mm,fin-pitch Fp=2.5-3.0 mm,fin-wavelength λ=14.0-17.5 mm and fin-wave-amplitude A=1.0-1.2 mm.The correlations of both heat transfer factor and friction factor are presented,and the deviations from the experimental measurements are within 20%.

关 键 词：triangular wavy fins heat transfer coefficients pressure drops plate-fin heat exchangers air cooling 

分 类 号：TK124[动力工程及工程热物理—工程热物理] U260.355[动力工程及工程热物理—热能工程]