本文借助高速摄影仪对不同流量下、换热表面与水平面成不同角度时,换热表面上冷却工质的分布,以及沸腾换热的特点进行了可视化实验研究.本文主要研究了三种换热表面方向,即水平向上,水平向下,以及与水平面垂直.研究表明:喷雾冷却的热流密度随着流量的增加而提高.当换热表面水平向上时,喷雾冷却换热效果最高;当换热表面水平向下时,换热效果最低,但在一定条件下,具有最高临界热流密度;当换热表面与水平面垂直时,其换热效果介于上述两者之间.
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