二维方腔内对流换热的场协同分析

ANALYSIS OF CONVECTION HEAT TRANSFER IN SQUARE CHANNEL BY PRINCIPAL OF FIELD COORDINATION

通过对协同方程的求解,得到在二维方腔内换热效果最优的流场形态随粘性阻力的增加而转变的现象。本文利用附加体积力和挡板的手段,用数值方法再现了粘性耗散不同时最优流场的几种流动形态。不同工况下的数值结果证实了换热效果较好的流动形态会随着粘性阻力的增加而发生转变的观象。最后,讨论了挡板热导率等参数对换热效果的影响。

The velocity distribution, which has the highest heat transfer efficiency, can be obtained by solving the coordination equations. The optimal flow pattern will alter by the increase of power consumption. In this paper, the flow patterns are reproduced in different cases, by adding the volume force and guide plate. The results of the numerical simulation prove that the preferable flow pattern will change by the increase of power consumption. And the effect of heat conduction of the guide plate is discussed.