固体火箭技术2025，Vol.48Issue(5)：662-671,10.DOI:10.7673/j.issn.1006-2793.2025.05.003
单阀门与双阀门喉栓式发动机推力负调分析
Analysis of thrust negative adjustment of single valve and double valve throat plug motor
摘要
Abstract
In order to solve the problem of restraining the thrust negative adjustment in throat-plug solid rocket motors,the re-sponse mechanism and dynamic characteristics of thrust negative adjustment in single-valve throat-plug motors were analyzed using step-response numerical simulations and experiments.A numerical simulation of the flow field under specific operating conditions(constant inlet mass flow rate and constant equivalent throat area during needle-plug operation)was carried out.The dynamic re-sponse characteristics of motor thrust and combustion chamber pressure were studied.The results show that the negative thrust ad-justment in the single-valve throat-plug motor is caused by the combustion chamber pressure response lagging behind changes in the equivalent throat area,and the negative adjustment is influenced by changes in combustion chamber pressure and the relative rate of equivalent throat area variation.Under different equivalent throat area change rates,the negative adjustment time remains consist-ent,the negative adjustment amplitude is positively correlated with the needle-plug movement speed,and the amplitude does not exceed 5%.In the double-valve throat-plug motor,the combustion chamber pressure at the needle plug is maintained constant,with numerical fluctuations below 0.5%,and the thrust dynamic response is unaffected by combustion chamber pressure.No reverse spike is observed in the thrust simulation curve,and the negative adjustment phenomenon is significantly suppressed.关键词
喉栓式发动机/推力负调/燃烧室压强动态响应/推力动态响应/数值模拟Key words
throat plug motor/thrust negative adjustment suppression/pressure dynamic response/thrust response/numerical simulation分类
航空航天引用本文复制引用
余昕宇,王健儒,李洞春,苗志文,廖栩锋,王琪虎..单阀门与双阀门喉栓式发动机推力负调分析[J].固体火箭技术,2025,48(5):662-671,10.基金项目
国家级项目. （）
