中文摘要：

以粉末烧结的方式制备了多尺度表面,并在常压下以去离子水为工质,对其进行沸腾传热实验,研究表面结构、液体温度、热流密度以及壁面过热度等参数对池沸腾传热的影响。结果表明：烧结多尺度表面能很好地协同蒸汽逸出和液体吸入对孔隙尺度的不同需求,可显著降低沸腾起始点过热度,扩展表面承载高热流密度的能力,大大提高沸腾换热系数;最大换热系数约为光表面的5～6倍。

英文摘要：

In order to improve the nuclear boiling heat transfer, a multi-scale porous surface was prepared by sintering the copper particles. A series of pool boiling experiments on different heater surfaces were conducted using deionized water as working fluid at atmospheric pressure. The effects of surface structure, liquid temperature, heat flux and surface superheat on the pool boiling heat transfer were investigated. The results showed that the multi-scale surface can perfectly meet the different demands for pore size between vapor release and liquid suction. For multi-scale surface, The surface superheat at the onset of nuclear boiling was decreased significantly and heat flux was expanded. Compared to that of a plain surface, the boiling heat transfer coefficient can be improved 5 to 6 times.