纵向涡发生器作用下矩形通道内流动换热性能研究

对渐缩式纵向涡发生器与椭圆支柱共同作用下矩形通道内的流动换热性能进行了研究，与渐缩式纵向涡发生器、渐扩式纵向涡发生器和光通道的流动换热性能进行了对比，并利用场协同原理对其换热机理进行了分析。结果表明：纵向涡发生器可增强换热，有利于降低加热板的表面温度，从而提高反应堆堆芯的CHF值。采用JF因子对各矩形通道的综合流动换热性能进行了比较，结果表明，渐缩式纵向涡发生器与椭圆支柱组合结构能以较小的阻力代价得到较大的换热效果，是一种理想的强化换热方式。

Study on Flow and Heat Transfer Characteristic in Rectangular Channel With Longitudinal Vortex Generator

In this study, the effects of three types of longitudinal vortex generator (LVG) configurations on the flow and heat transfer characteristics in a rectangular channel were investigated and analyzed by field synergy principle. The results show that the temperature of plate fuel assembly can be decreased and the critical heat flux (CHF) of the reactor will be increased. Compared by the performance evaluation parameter, JF factor, the results indicate that “common flow up” combined with ellipse pole configuration can bring about more enhancement of heat transfer at a modest expense of the additional pressure-loss.