空间站膜盒贮箱抽气和加注过程特性  

Characteristics of pumping-back and propellant-refilling processes for diaphragm tank of space station

作　　者：孙威 左岁寒 SUN Wei;ZUO Suihan(Beijing Institute of Spacecraft System Engineering,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院北京空间飞行器总体设计部,北京100094

出　　处：《航空动力学报》2023年第9期2299-2304,共6页Journal of Aerospace Power

摘　　要：针对增压气体复用式推进剂在轨补加方式的两大关键过程—贮箱抽气过程和推进剂加注过程的物理特性开展了研究,建立了膜盒贮箱抽气过程及补液过程的数学模型。仿真计算与地面试验的对比分析结果表明:抽气过程中贮箱气腔压力变化近似等温过程,气瓶压力变化近似指数为1.1的多变过程;加注过程中贮箱气腔压力变化近似等温过程。进一步对“和平号”空间站补加过程实例的仿真研究结果表明,膜盒贮箱抽气过程中高压气瓶中气体散热效果的强弱显著影响气瓶压力变化过程;膜盒贮箱加注过程中,随着气腔容积减小,贮箱压力上升速率将逐渐增大,由此导致加注速率在后期逐渐下降。Numerical models for a pumping-back process of pressurized gas and a propellantrefilling process of propellant tank were built,and the simulation results were compared with experimental data using pure water.It was found that the pressure variation of propellant tank in the pumping-back process and the refilling proces was similar to an isothermal process,and the pressure variation of pressurized gas-bottle in the pumping-back process was similar to a polytropic process with polytropic exponent of 1.1.Further simulation analysis was carried out with the developed model to investigate a typical propellant refueling process of the Mir Space Station,indicating that the pressure-rising rate of a pressurized gas-bottle in pumping-back proces was significantly influenced by heat dissipation of the pressurized gas-bottle,and the propellant-refilling rate of a tank descended gradually due to increase of the back pressure of the tank in a propellant-refilling process.

关 键 词：空间站 推进剂补加 贮箱 气瓶 多变模型 

分 类 号：V419.9[航空宇航科学与技术—航空宇航推进理论与工程]