火箭推进2023，Vol.49Issue(6)：82-89,8.
RBCC发动机不同构型隔离段流场仿真
Simulation on flow field in isolator of RBCC engine with different configurations
摘要
Abstract
To explore the impact of elliptical slightly-expanded isolator and square to circular variable cross-section isolator on the thrust performance of RBCC engine,a RBCC test piece with a certain config-uration was taken as the research object.The accuracy of the numerical scheme is verified by comparing the static pressure distribution on the centerline of the lower wall between the experimental results and the numerical simulation results,and it shows the numerical scheme is reliable.When the inlet flow Mach number is 3,the excess air coefficient is 1.5,the flow field and combustion process structure of the two different RBCC isolators are analyzed,as well as the thrust performance of the engine.The results show that the anti-backpressure ability of variable cross-section isolator is significantly lower than that of ellipti-cal slightly-expanded isolator.And when the heat release from the fuel is relatively concentrated and the pressure in the combustion chamber increases relatively large,a large flow separation zone will be genera-ted at the lower wall of variable cross-section isolator,which extends to the downstream.And it will make the flow field uniformity of the chamber worse,which will result in the poor thrust performance.关键词
RBCC发动机/隔离段/煤油燃烧/数值模拟/发动机性能Key words
RBCC engine/isolator/kerosene combustion/numerical simulation/engine performance分类
航空航天引用本文复制引用
王壮,李钰航,张蒙正,南向军..RBCC发动机不同构型隔离段流场仿真[J].火箭推进,2023,49(6):82-89,8.基金项目
国家重点实验室基金(6142704220204) （6142704220204）
