空间高功率激光二极管泵浦源阵列的相变热控系统

Phase change thermal control system for space high-power laser diode pumping source array

为了实现空间高功率激光二极管泵浦源阵列的快速散热,建立了空间高功率激光二极管泵浦源阵列相变热控系统,对热控系统的热界面材料(TIM)、紫铜热沉、相变材料、相变增强材料、主动加热回路和太空辐射板进行了研究与设计。首先,介绍了激光二极管泵浦源阵列的热特性与热控指标,从而提出热控设计思路,详细设计了热控系统,并在有无泡沫铜填空的条件下制定了两种热控方案。然后,用NX软件分析了两种不同的方案。分析结果显示:不填充泡沫铜方案的整个相变过程在800 s完成,LD上的温度最高达到59.98℃,相变材料上表面温度最高达到47.12℃;填充泡沫铜方案在200 s内完成相变过程,LD最高温度为38.35℃,并且LD在360 s后和相变温度点温度一致。填充泡沫铜方案可以满足10~40℃的温度指标要求。最后,根据填充泡沫铜方案设计加工了激光二极管泵浦源阵列热控系统,通过实验验证,该系统可以满足空间高功率激光二极管泵浦源阵列快速散热要求。

To achieve effective heat dissipation for a space high-power laser diode pumping source array,a phase change thermal control system has been developed.Key components like thermal interface materials(TIM),copper heat sinks,phase-change materials,reinforcing materials,active heaters,and space radia⁃tors have been designed and evaluated.Initially,the thermal specifications of the laser diode pumping ar⁃ray are outlined,followed by the thermal control design concepts.A detailed design of the thermal control system was developed,and two thermal control schemes were formulated with and without copper foam filling.Then,the two different schemes were analyzed using NX software.The first scheme reaches a peak temperature of 59.98℃in 800 s,with the phase-change material surface at 47.12℃.The second scheme achieves a maximum temperature of 38.35℃in 200 s and maintains thermal congruence with the phase-change temperature after 360 s,meeting the 10-40℃specification.Consequently,the thermal con⁃trol system for the laser diode pumping source is designed and manufactured based on the second scheme,ensuring efficient heat dissipation.