纵向涡发生器对圆形翅片管换热强化的影响

The Effect of Circular Finned Tube Heat Transfer Enhancement by Using Longitudinal Vortex Generators

利用CFD计算软件FLUENT对带有纵向涡发生器的圆形翅片管的流体流动和传热过程进行数值模拟,并与普通圆形翅片管加以对比。结果表明,带有纵向涡发生器的翅片管换热效果明显优于普通翅片管。应用场协同原理解释认为,纵向涡发生器使流体速度和温度梯度之间夹角减小,改善了速度场和温度场的协同性,从而增强了换热效果。

The fluid flow and heat transfer process of circular finned tube with longitudinal vortex generators（LVGs） were numerically simulated with the CFD calculation software FLUENT,then compared with the normal circular finned tube.The simulation results show that the performance of circular finned tube with longitudinal vortex generators is far better than that of the normal circular finned tube.It can be explained from the view point of field synergy principle,which says that the longitudinal vortex generators can enhance effect of heat transfer because it reduces the angle between velocity and fluid temperature gradient.