空天防御2024，Vol.7Issue(3)：72-78,7.
燃烧室声腔模态特性影响因素研究
Study on the Factors Influencing the Modal Characteristics of Combustion Chamber Sound Cavity
摘要
Abstract
To study the unstable combustion performance of solid rocket motors,this paper utilized both experimental testing and numerical simulation to explore the influence of the side pipe's position and length on the chamber's acoustic mode.The differences in the acoustic mode under different experimental boundaries were compared,and the influence of airflow velocity and temperature on the acoustic mode characteristics of the combustion chamber was analyzed.Results show that when the side branch pipeline collapses inward and the length of the side branch pipeline decreases,the modal frequency value gradually increases;when the opening area increases,the acoustic modal frequency value increases.The acoustic modal results of the pipeline-connected state are close to those of the single-end open state;When the flow velocity increases,the modal values of each order of the sound cavity gradually decrease;when the temperature increases,the modal values of each order of the cavity gradually increase.关键词
固体发动机/不稳定燃烧/声腔模态/气流流速/气流温度Key words
solid rocket motor/unstable combustion/the modal of sound cavity/airflow velocity/airflow temperature分类
航空航天引用本文复制引用
范博超,张刚,齐江龙,杜云祥..燃烧室声腔模态特性影响因素研究[J].空天防御,2024,7(3):72-78,7.
