空间站舱外泄漏羽流场数值模拟与解析解研究  

Plume Field of Ammonia Leaking out of Space Station: A Simulation and Theoretical Study

作　　者：花雨 毕海林 孙伟[2] 孙立臣[2] 孟冬辉[2] 王旭迪[1] Hua Yu;Bi Hailin;Sun Wei;Sun Lichen;Meng Donghui;Wang Xudi(School of Mechanical Engineering,Hefei University of Technology,Hefei 230041,China;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China)

机构地区：[1]合肥工业大学,合肥230041 [2]北京卫星环境工程研究所,北京100094

出　　处：《真空科学与技术学报》2019年第12期1067-1071,共5页Chinese Journal of Vacuum Science and Technology

摘　　要：密封性能在保证空间站正常运行中极其重要。本文针对空间站运行过程中可能发生的舱外氨气泄漏,建立了太空真空环境中气体分子运动的物理模型,运用直接蒙特卡洛模拟方法对泄漏到太空中的气体羽流场进行数值模拟,得到羽流场的气体密度分布规律,并通过求解无碰撞的玻尔兹曼方程得到羽流场粒子密度分布的解析解,最后验证了解析解的正确性,以期为未来空间站的在轨检漏提供理论支持。The plume field of the ammonia,leaking out of a space station,was empirically approximated,mathematically modeled,numerically evaluated in direct simulation Monte Carlo(DSMC) method,and theoretically calculated by analytically solving the collision-free Boltzmann equation.The influence of the space environment and leak-hole diameter on the plume field distribution was investigated.The simulated results show that the leak-hole diameter has a major impact.To be specific,as the leak-hole diameter increases in a steady state,the average pressure and gas density increases;a decreasing axial pressure distribution and a symmetric radial pressure profile show up.Depending on the hole-size,the gas density has a decreasing axial(vertical) distribution.The simulated results and analytical solution were found to be in good agreement.We suggest that the simulated and calculated results be of basic and technological interest in leak detection of space station.

关 键 词：空间站 泄漏 直接蒙特卡洛模拟 数值模拟 羽流 解析解 

分 类 号：V411.8[航空宇航科学与技术—航空宇航推进理论与工程]