上海航天（中英文）2024，Vol.41Issue(2)：104-113,10.DOI:10.19328/j.cnki.2096-8655.2024.02.014
比例式变推力固体姿控发动机非稳态特性研究
Study on Unsteady Characteristics of Proportional Variable Solid Attitude Control Motor
摘要
Abstract
In order to investigate the unsteady characteristics in the internal flow field of proportional variable solid attitude control motor,a two-dimensional axisymmetric model of proportional pintle thruster is established.The dynamic mesh method and custom inlet conditions are used to simulate the working mode of the thruster which inlet pressure varies with the throat area.The variations of the performance parameters of the internal flow field are obtained.The results show that the characteristics such as subsonic recirculation zones,oblique shock waves,and flow separation will appear in the internal flow field during the unsteady working process.The pressures of the inlet,the pintle wall,and the nozzle wall all increase when the distance between the pintle and the throat decreases,the thrust of the thruster gradually increases when the pintle load increases,and thus the continuous thrust regulation is achieved.The working frequency will aggravate the pressure fluctuation of the head during the pintle advance.The larger the convergence angle of the pinhead is,the smaller the head recirculation zone is.When the throat area is fixed,the higher the burning rate pressure index is,the larger the variation ranges of engine pressure and thrust are.Therefore,it is necessary to choose an appropriate pressure exponent to achieve a wide range of thrust adjustment.关键词
固体姿控发动机/针栓推力器/非稳态特性/动网格方法/内流场Key words
solid attitude control motor/pintle thruster/unsteady characteristics/dynamic mesh method/internel flow field分类
航空航天引用本文复制引用
张一飞,范凡,李世鹏,夏仕同,隋欣..比例式变推力固体姿控发动机非稳态特性研究[J].上海航天（中英文）,2024,41(2):104-113,10.基金项目
国家自然科学基金(U2341288) （U2341288）
