化工进展Issue(7)：1691-1696,6.DOI:10.3969/j.issn.1000-6613.2014.07.006
振荡流通过内插螺旋翅片管传热特性的数值模拟
Numerical simulation of heat transfer of oscillatory flow in a tube fixed with spiral fins
摘要
Abstract
Oscillatory baffled heat exchangers (OBHEs) are widely used in chemical processes involving heat or mass transfer. OBHE with spiral fins inserted was simulated using the three dimensional unsteady method in the range of Strouhal number St=2,4,8 and oscillatory Reynolds number Reo=20,40,80. Instantaneous three dimensional stream lines were drawn to show the change of flow status with time,and periodic formation and shedding of spanwise and streamwise vortexes was observed. The changes with time of peripheral local heat transfer coefficients (HTCs)and peripherally averaged HTCs with different oscillatory parameters (St and Reo) were obtained. The local HTCs were not distributed uniformly peripherally and a maximum value was reached at the diagonally across position of fins. Peripherally averaged HTC varied with time periodically and time averaged HTC increased with increasing amplitude,but hardly changed with frequency. In the range covered by this work,averaged HTC could be four times higher than that of tube laminar flow.关键词
振荡折流换热器/螺旋翅片/强化传热/计算流体力学Key words
oscillatory baffled heat exchanger/spiral fins/enhancement of heat transfer/CFD分类
能源科技引用本文复制引用
屈晓航,田茂诚,冷学礼..振荡流通过内插螺旋翅片管传热特性的数值模拟[J].化工进展,2014,(7):1691-1696,6.基金项目
山东省科技攻关（2008GG10007009）及山东科技发展计划（2012GGX10421）项目。 （）
