摘要
研究了航天器推进系统管路充填过程动态模型与计算方法。以一维管道瞬变流理论为基础 ,采用瞬变管流湍流频率相关摩擦损失模型计算管壁摩擦流阻 ,构造了管路分支流阻计算模型 ,考虑了液流撞壁后的蒸汽泡团释出与崩溃现象。数值计算采用特征线方法 。
A mathematical model for the priming process of evacuated propellant feed systems was presented based on one dimensional fluid transient theory. Dissipation effects due to wall friction was accounted for by a new frequency dependent dynamic friction model. A novel approach for branching loss modeling was presented. Particularly, release and collapse of vapor bubble at the closed end of feedlines were modeled. The method of characteristics was employed for numerical analysis. Simulation results show that the model give reasonable description for water hammer and flow oscillation during priming process.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2000年第2期25-28,共4页
Journal of Propulsion Technology
关键词
航天器
推进系统
动态模型
管路充填
水击
Spacecraft propulsion
Propulsion system
Propellant transfer
Feedline
Water impingement
Dynamic model
