低熔点合金相变热控数值模拟与实验研究

This paper mainly studies the thermal control performance of phase transition materials of 47 alloy and 58 alloy low-melting alloy phase change materials and the heat transfer phenomena during the phase transition process. First, the reliability of the enthalpy-porous medium model and Boussinesq hypothesis is verified by combining the phase change thermal control experiment with numerical simulation. After that, the two low-melting alloy phase change materials and the traditional organic phase change materials with similar melting points thermal control performance are compared and analyzed through numerical simulation. It is found that the two materials selected in this paper have a better temperature control effect which have more thermal control time. Furthermore, the temperature distribution and solid liquid interface are barely influenced by the natural convection in the phase change process of the two low-melting alloy phase change materials. The natural convection effect could be neglected.