为实现在复杂外热流条件下对CO2探测仪红外探测器组件温度的有效控制, 对其进行了详细的热设计。对红外探测器周围外热流进行分析, 确定了其散热面位置。基于红外探测器所处空间热环境以及自身高功耗、低热控指标的特点, 提出热设计方案。对红外探测器组件有限元模型进行了热分析计算, 得到各个转角姿态下的红外探测器组件的温度范围为-31.8~-26.9 ℃, 计算结果满足设计要求。通过CO2探测仪热平衡试验对热设计进行了验证, 试验中红外探测器组件的温度范围为-32.6~-30.1 ℃, 试验结果与计算结果基本一致, 满足热控指标要求, 说明热设计方案在复杂外热流条件下合理可行, 具有较好的适应性。

In order to effectively control the temperature of infrared detectors on carbon dioxide under complex heat flux, detailed thermal design was presented. According to the analysis of heat flux around the infrared detectors, positions of heat dissipation surfaces were confirmed. Based on the space thermal environment and the characteristics of complex heat flux, high power consumption and low thermal control index, the thermal solutions of infrared detectors were proposed. The thermal analytic calculation of the finite element model was carried out, and the temperature range of the infrared detectors was -31.8 ℃ to -26.9 ℃ in different postures of angle, the results met the design requirements. A thermal balance test of carbon dioxide was actualized to verify the thermal design, the temperature of the infrared detectors was from -32.6 ℃ to -30.1 ℃. These results conform with the calculated ones and meet the thermal controlling requirements, the thermal design is reasonable and adaptable in complex heat flux.