基于ANSYS Icepak的空心散热器仿真优化

Simulation Optimization of Hollow Radiator based on ANSYS Icepak

利用有限元方法对空心散热器的性能优化进行探讨。基于ANSYS Icepak仿真软件,在机箱简化模型内模拟空心散热器实现对一恒定热源的散热过程,获得散热器空心程度对系统内温度场的影响规律,进而分析风速对热阻、风阻的影响。结果表明:当散热器壁厚为1.25 mm时,散热效果最优,散热器最高温度约降低20.4%,质量减小约14.3%;散热器上的热阻随着风速的增大而减小,且逐渐趋于平缓,而风阻随着风速的增大而增大,且趋势愈发明显。在空心散热器设计中,应权衡选取风速,以期达到最佳的散热性能。

The performance optimization of hollow radiator is discussed using Finite Element Method.Based on the ANSYS Icepak thermal simulation software, the dissipation process of a hollow radiator upon a constant heat source is simulated in the simplified model of the chassis, and the influence of the hollow extent of the radiator on the temperature field in the system is obtained. Further, the influence of the wind speed on the thermal resistance and the wind resistance is analyzed. The results show that when the wall thickness of the radiator is 1.25 mm, the heat dissipation effect is the best. The maximum temperature of the radiator is reduced by about 20.4% and the mass is reduced by about 14.3%. The thermal resistance of the radiator decreases as the wind speed increases, and it gradually tends to be gentle. The wind resistance increases as the wind speed increases, and it gradually tends to be more obvious. In the design of hollow radiator, one should weigh the selection of wind speed in order to achieve the best heat dissipation performance.