固体火箭技术2025，Vol.48Issue(2)：253-264,12.DOI:10.7673/j.issn.1006-2793.2025.02.010
侧壁收缩的三维曲面隔离段内流特性分析
Analysis of internal flow characteristics in 3D curved surface isolator with sidewall contraction
高寒 1谢旅荣 1潘纪富 1韩家启 1蔡含怡1
作者信息
- 1. 南京航空航天大学 能源与动力学院,南京 210016
- 折叠
摘要
Abstract
In order to explore the internal flow characteristics of the three-dimensional curved surface isolator,the numerical simulation method was used to analyze the internal flow characteristics of the isolator without sidewall contraction benchmark profile and sidewall contraction model,and the influence of sidewall contraction was studied.The results show that the flow of the isolator profile is mainly dominated by shock waves,expansion waves and their reflected waves generated by the deflection of the upper and lower walls,and the airflow is not obviously disturbed laterally,while the profile of the turning section is affected by the contraction of the curved wall and sidewall,and the distribution of high and low energy flows are uneven;Compared with the benchmark profile,the contraction of the sidewall of the isolator leads to the formation of three-dimensional compression wave,and a local high pressure region near the sidewall of the isolator is formed downstream of the compression wave.Under the influence of lateral disturbance,the airflow near the upper and lower walls deflects in the direction of symmetry,and the cross-sectional mainstream flow field shows ob-vious low-speed and high-speed regions;The more severe the sidewall contraction of the isolator is,the stronger the sidewall com-pression is,and the more severe the lateral interference is.The total pressure recovery coefficient and Mach number at the outlet of the three-dimensional curved surface isolator decrease,and the low-speed and low-total pressure area at the lower left corner of the flow field at the outlet of the turning section increases.In sum,severe sidewall contraction will increase the total pressure loss,affect the internal flow field in the isolator and reduce the air flow quality entering the combustion chamber.关键词
曲面隔离段/侧壁收缩/扫掠压缩波/横向扰动/流场Key words
curved surface isolator/sidewall contraction/sweep compression wave/lateral disturbance/flow field引用本文复制引用
高寒,谢旅荣,潘纪富,韩家启,蔡含怡..侧壁收缩的三维曲面隔离段内流特性分析[J].固体火箭技术,2025,48(2):253-264,12.
