载人航天器在压力应急环境下处于低压高浓度氧环境.为了分析该环境下载人航天器在太空中飞行以及地面模拟试验中的着火危险性,研制了低压高浓度氧环境着火试验装置,并进行了燃烧试验.对载人航天器压力应急环境下材料的燃烧速度和点火能量等因素进行分析研究,得到了压力应急工况的材料着火和燃烧的规律,并给出了火灾防范的建议.%When the manned spacecraft is in a pressure emergency condition, one may see low pressure and rich oxygen, In order to analyze the fire hazard on the manned spacecraft's orbital flight and the ground simulation test, a combustion chamber which can simulate the oxygen-rich and reduced-pressure is developed. This paper analyzes the materials' flame propagation rate and the threshold ignition energies of manned spacecraft in the pressure emergency condition, and the flammability characteristics of materials. Recommendations for fire preventions are proposed.
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