中文摘要：

研究了泡沫金属中相变材料的相变熔化过程,由于金属骨架和相变材料传热性能的巨大差异,建立了骨架和相变材料的双温度模型,采用显热容法进行了数值模拟。模拟结果显示,相变材料中填充泡沫金属,能有效改善相变材料的温度分布;在相变时,骨架与相变材料的温差较大,局部热不平衡明显;泡沫金属孔隙率越小,石蜡熔化越快。

英文摘要：

The melting process of phase change materials（PCMs） in high porosity metal foams was studied.A two-temperature model was used because of the large thermal difference between metal frame and PCMs.Apparent heat capacity method was used to simulate the melting heat transfer process of paraffin.The simulation results indicate that metal foams makes the temperature distribution of the phase change material more even;There is big temperature difference between metal frame and PCM during phase change,and local thermal non-equilibrium is obvious;Melting speed becomes fast with the decreasing of metal foams porosity.