某弹载天线热管PCM热控装置参数分析

Parameter analysis of a heat pipe/PCM thermal control device for missile-borne antenna

为获得某弹载天线热管PCM复合热控装置的相控阵天线的温控性能,建立了其整机数学模型,并基于DSC测试数据,采用有效热容法对材料的相变过程进行模拟。根据T/R组件安装面的最高温度和储热器内相变材料的相变完成情况,研究了相变材料导热系数和翅片数对整机热控性能的影响。研究发现,使用较高导热系数的相变材料与较多的铜翅片数量有利于提高装置的热控性能,且两参数效益可以互补。最后根据研究获得的综合优选参数,制作了试验样机,验证了参数设置的合理性和可行性。

For thermal control performance of missile-borne phase array antenna with built-in heatpipe/PCM thermal control device,a mathematic model is established.The PCM's phase transformation process is simulated by the effective specific heat method based on the DSC test data.Besides,the influences of the PCM's thermal conductivity and the number of fins on the thermal control performance of the device are studied,focusing on the highest temperature on the TR modules'mounting surface and the PCM's melting process in the storage.It is shown that both a higher value of the thermal conductivity or a larger number of fins are conducive to improving the performance,and the two groups of parameters are complementary in effect.A prototype is built according to the optimum parameters,the actual test shows that the heatpipe/PCM thermal control device provides a good solution to the antenna's thermal design problem.