【摘要】 以复合材料气瓶热防护材料的耐高温及隔热性能为研究对象,通过真空舱模拟上面级飞行段的真空环境,采用石英灯阵模拟热源,对两种热防护方案开展真空热试验,分析了不同材料(组合)、多层隔热组件不同单元的隔热性能及其差异产生的原因。结果表明两种防热方案都可使气瓶壁面温度满足不超过70℃的温度要求,其中"柔性隔热毡+中温多层"组合防热结构的耐温和隔热性能更优,并通过理论计算与试验值对比验证了热仿真计算中的不确定性,试验结果可为后续型号防热设计提供参考。更多还原

【Abstract】 To determine the heat insulation performance of the thermal protection materials cladding the gas cylinders,a thermal vacuum test is implemented on two species thermal protection sets,with a radiant heat source simulated by a quartz lamp heater,and the atmospheric environment simulated by a vacuum tank. Results indicate that two species thermal protection schemes are both satisfied within the upper limit of the temperature,and the heat insulation property of the combination thermal protection structure“flexible insulation+ middling temperature MLI ”has better insulation performance. The indeterminacy of the thermal analysis method is evaluated by comparison with the result of the thermal test. The test data may server as a reference for future thermal protection design of spacecrafts.更多还原