冲压发动机转级流场数值仿真研究

冲压发动机需要利用助推发动机加速到接力马赫数,然后动力系统进行转级,实现冲压发动机接力工作。为了提高空间利用率,目前的冲压发动机多采用整体式设计方案,要求在冲压发动机设计时必须考虑助推发动机退出冲压发动机燃烧室的分离过程对发动机转级的影响。采用CFD技术对冲压发动机转级的分离过程进行了数值仿真计算,显示分离过程对冲压发动机的转级有很大影响。

Numerical simulation of the ramjet engine separation flow

A ramjet engine is required to the staging Mach number before start up by a booster.For an integrated ramjet engine,the concept that the booster is inserted into the ramjet combustion chamber to spare the structural space is usually adopted.So the influence due to the booster separation should be considered in the design of a ramjet engine.This paper simulates the separation of a supposed conception using the CFD techniques.The results show that the separation will greatly affect the transition.