【摘要】 本文采用实验的方法,研究了单面加热矩形狭窄通道内,翼片型纵向涡发生器对流动换热的强化作用。在此基础上,应用大涡模拟的方法对通道内的瞬态流场及其对壁面对流换热的影响进行了研究,并将数值模拟与实验进行了比较。结果表明,通过添加翼片可以在流动中产生涡流,强化壁面边界层与流体的物质和能量交换,并验证了将大涡模拟应用于纵向涡强化换热研究的可行性。更多还原

【Abstract】 The flow and heat transfer enhancement of a pair of embedded longitudinal vortices in narrow-channel are studied experimentally. The large eddy simulations using a Smagorinsky subgrid model are carried out with FLUENT to study the transient flow field in channels and the influence on heat convection. The effectiveness of LES and the enhancement of convective heat transfer are also proved by compared with the present experiment.更多还原