超轻多孔金属材料数值仿真与实验测试

Numerical Simulation and Experimental Test of Ultra Light Porous Metal Materials

超轻多孔金属材料具有体积密度小、相对质量轻、比表面积大、比力学性能高、阻尼性能好等特性,可应用于机载电子系统散热,达到强化散热的效果。针对超轻多孔金属材料建立了十四面体精细结构模型、强迫对流换热模型,开展了对流换热仿真及实验测试验证,结果表明多孔金属材料可以有效增强扰流,提高换热性能。基于超轻多孔金属材料十四面体结构单胞精细对流数值仿真模型的仿真结果与实验值误差在15%以内。

The ultra light porous metal materials have the characteristics of small bulk density,relatively light weight,large specific surface area,high specific mechanical properties and good damping performance,etc.;they can be applied to heat dissipation of airborne electronic system to enhance heat dissipation.The tetrakaidecahedron fine structure model and forced convection heat transfer model are established for the ultra light porous metal materials;the convection heat transfer simulation and experimental test verification are carried out.The results show that porous metal materials can effectively enhance the turbulence and improve the heat transfer performance.The error between the simulation results and the experimental test values is less than15%.