摘要
火箭飞行过程中,长时间高强度的热流冲击会使发动机钛合金气瓶温度升高,从而导致气瓶的安全系数及可靠性降低。针对此问题,开展了气瓶热防护层研究,气瓶热防护层采用多层复合结构的设计方案;采用一种新型轻质疏松纤维材料——柔性隔热毡作为热防护层的重要隔热层;进行了热防护层的热分析计算和热真空试验验证。结果表明:气瓶热防护层能够承受长时间高强度热流冲击,对气瓶进行有效热防护,提高了气瓶的可靠性,保障了飞行安全。
Pressure vessels on the rocket engine endure a long-time high dense heat environment while the rocket flying.It canlead to the reduction of safety level and reliability.Aiming at this problem,a research on a novel thermal protective layer used on thepressure vessel is carried out.The thermal protective layer is designed into a multi-layer composite structure and a new loosenlow-dense fiber material is applied as the key part.Also,thermal analysis and hot test in vacuum condition are conducted.The resultsshow that the new thermal protective layer could stand the long-time high dense heat flux and effectively protect the pressure vessel,hence greatly improve the reliability of pressure vessel and ensure the safety of flight.
作者
刘建方
庞红丽
潘亮
孙慧娟
Liu Jian-fang;Pang Hong-li;Pan Liang;Sun Hui-juan(Beijing Aerospace Propulsion Institute, Beijing, 100076)
出处
《导弹与航天运载技术》
CSCD
北大核心
2017年第1期29-32,共4页
Missiles and Space Vehicles
关键词
热防护
多层复合结构
柔性隔热毡
气瓶
Heat insulation
Multilayer composite structure
Flexible thermal protective layer
Pressure vessel
