【摘要】 为预测空间站两舱压力平衡时间,基于热力学状态方程和流体流导概念建立了由专用阀门连通的两空间舱压力平衡的数学表达式,揭示了两舱压力差与初始条件及时间的关系。表明平衡压力差与气舱容积、初始压差成正比,与连通结构的流导成反比,并与时间成指数倒数关系。随着时间的推移压差逐渐变小,但在有限时间内压差不可能趋于零。更多还原

【Abstract】 A novel analytical expression has been successfully developed,based on the thermodynamic gas-state equation and the concept of fluid conductance,to evaluate the pressure-balancing time in connecting two chambers of the space station via a dedicated gas valve.The influence of the initial conditions on the time evolution of the pressure difference of the two chambers can be predicted with high precision.The calculated results show that the pressure difference is proportional to the volumes and the initial pressure difference of the two chambers,but inversely proportional to the conductance of the connectivity structure between the two chambers.In addition,the pressure difference depends on 1/expt,(t is the elapsing time) approaching zero at a decreasing rate with the increase of time.更多还原