摘要
以氦气瓶贮气闭式控制增压系统启动过程气枕压力变化规律为研究对象,讨论了增压系统响应时间、不同初始气枕容积、不同发动机流量启动加速性对启动过程气枕最小压力的影响。分析结果表明:对于大中型液体运载火箭,如能有效控制增压系统响应时间,使用较小的初始气枕容积即可保证启动过程发动机入口压力要求及贮箱载荷条件要求,可有效提高箭体结构效率。
Start up process of liquid rocket's tank pressurization is numerically simulated.In this pressurization system,high pressure helium is saved in bottle,and the pressure variety is controlled by the launch vehicle control system.The effects of the pressure control system's response time,initial ullage gas volume,start up process of engine's flux on the minimum tank pressure during start up process are analyzed.Analyses show that,for medium-scale or large-scale launch vehicles,if the response time of the pressurization system is effectively controlled,a smaller initial ullage gas volume can guarantee the requirements of the rocket engine's inlet pressure as well as the tank structural load.
作者
邵业涛
罗庶
冉振华
黄辉
Shao Ye-tao;Luo Shu;Ran Zhen-hua;Huang Hui(Beijing Institute of Astronautical Systems Engineering, Beijing, 100076)
出处
《导弹与航天运载技术》
CSCD
北大核心
2017年第4期35-38,共4页
Missiles and Space Vehicles
关键词
液体运载火箭
贮箱
增压
最小气枕容积
Liquid rocket
Tank
Pressurization
Initial ullage gas volume
