不同孔密度泡沫铜在不同压力下沸腾换热试验研究

Experimental study on boiling heat transfer of different pore density copper foams under different pressures

以去离子水为工质,探究了不同孔密度泡沫铜在不同压力下的沸腾换热性能.实验结果表明:泡沫铜表面生成汽泡的总体积大于光滑表面生成汽泡的总体积.孔密度对泡沫铜的沸腾换热性能有很大影响,在试验参数测试范围內,泡沫铜的沸腾换热性能随孔密度的增加先增强后减弱,70PPI为最佳孔密度.相对于光滑表面,压力越大,高孔密度金属泡沫的强化沸腾换热能力减弱.

Using deionized water as working fluid,we study the effects of pore density of copper foam on the boiling heat transfer performance under different pressures.The experimental results show that the total volume of bubbles formed on the surface of metal foam is larger than that on the smooth surface.And the pore density of the foam copper has a great influence on the boiling heat transfer performance.In the test range,with the increase of foam metal PPI,the heat transfer capacity of foam copper increases firstly and then decreases,and 70PPI is optimal.Compared with the smooth surface,the boiling heat transfer ability of the high porosity metal foam is weakened under the high pressure.