The results denote that the sand layer can greatly enhance heat transfer in high temperature region because it changes film boiling to liquid film evaporation in the sand layer 在高温金属面上覆盖砂层后，可将高温面上的膜沸腾转化为砂粒表面的液膜蒸发，从而大幅度提高表面换热系数，强化冷却能力。
2.
Experimental study is performed on the mist cooling of heated high temperature surface covered by a sand layer to investigate the effects of both sand size and thickness of sand layer on heat transfer charateristics in order to enhance heat transfer of film boiling region 摘要研究了高温金属面上覆盖砂层后的喷雾冷却换热特性，测试了砂粒颗粒大小和砂层厚度对换热特性的影响。
