低温液氙贮箱轻量化研究

Lightweight Design of Cryogenic Liquid Xenon Tank

根据静止轨道卫星长期在轨运行对电推进系统大容量贮供单元轻量化需求,开展了大型液氙贮箱轻量化技术研究。针对氙的特性及推进器轻量化需求,给出液氙贮箱的整体结构,对低温液氙贮箱的储存温度和压力进行优化分析,进而在优化后的温度和压力条件下对液氙贮箱的整体结构进行了轻量化研究。结果表明液氙储存质量一定时,随压力的升高贮箱容积减小,总质量增大;随温度升高,贮箱绝热结构质量减小贮箱容积增大,总质量增加。实际设计中需要综合考虑温度和压力的影响,本文以储存4836 kg液氙的电推进器为例,对低温液氙贮箱进行轻量化研究,为液氙的储存技术提供参考。

The long-term operation of the geostationary orbit satellite needs the large capacity storage and supply unit of the electric propulsion system.According to the xenon characteristics and the electric propulsion system requirements,the overall structure design of liquid xenon tank is given,the storage temperature and pressure of cryogenic liquid xenon tank are optimized,and then the lightweight of tank is optimized under the optimized temperature and pressure conditions.The results show that when the storage weight of liquid xenon is constant,with the increase of pressure,the tank volume decreases but the total weight increases;and with the increase of temperature,the MLI weight decreases,but the tank vo lume increases,and the total weight increases.The effect of temperature and pressure should be considered comprehensively in the actual design.Taking the electric propeller with 4836 kg liquid xenon storage as an example,the light weight of cryogenic liquid xenon storage tank was studied to provide guidance and reference for the storage and application technology of liquid xenon.