基于动网格的空间快速减压过程流场数值模拟与分析  

Numerical Simulation and Analysis of Spatial Rapid Decompression Process Based on Dynamic Grid

作　　者：王军伟[1] 龚洁[1] 丁文静[1] 徐靖皓 顾苗[1] 张立明 WANG Jun-wei;GONG Jie;DING Wen-jing;XU Jing-hao;GU Miao;ZHANG Li-ming(Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China)

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《真空》2022年第2期32-37,共6页Vacuum

基　　金：北京卫星环境工程研究所自主研发项目(YFKT-201909260034)。

摘　　要：空间快速减压过程研究及其效应评估和应对防护技术是未来实现临近空间探索、深空探测等重大国家探索工程所必须面临的难题。面向快速减压环境地面模拟装置的研究需求,为了更真实更准确地分析减压过程气体流场特性,预测减压及平衡时间,提出了基于动网格技术的数值模拟方法,完成了特定减压地面模拟装置的仿真分析。结果表明:泄压阀门在尚未完全开启到位时,两舱室的压力已基本持平,弯头在泄压初期平均压力损失较大而后期趋缓。基于动网格技术的分析方法可克服传统方法对泄压阀门开启过程中预测能力不足等问题,可有效获取泄压全周期过程的气体流动特性及压力变化规律。The research of rapid decompression process with its effect assessment and protection technology is the problem that must be faced by the future exploration projects such as near space exploration and deep space exploration. In order to analyze the characteristics of gas flow field in decompression process and predict decompression and equilibrium time more realistically and accurately, a numerical simulation method based on dynamic grid technology was proposed to complete the simulation analysis of the ground simulation facility for decompression. The results show that when the relief valve is not fully opened in place, the pressure of the two chambers is basically equal, the average pressure loss of the elbow is large at the initial stage of decompression, but slows down at the later stage. The analysis method based on dynamic grid technology can overcome the problem of insufficient predictive ability of traditional methods in the opening process of relief valve, and can effectively obtain the gas flow characteristics and pressure change law in the full cycle process of decompression.

关 键 词：快速减压 动网格 数值模拟 非定常流动 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程]