突扩燃烧室低频压力振荡的大涡模拟

Large-eddy simulation of pressure oscillations in a dump combustor

摘要:

振荡燃烧是冲压发动机研制过程中面临的严峻问题,而振荡燃烧与涡运动规律密切相关,文中用大涡模拟的方法对突扩燃烧室冷态流动条件下的涡运动和低频压力振荡进行了模拟,并在此基础上得出了影响振荡频率和幅值的因素。

Abstract:

In the design process of ramjet, combustion oscillation is a crucial problem. In this paper, the vortex motion and low-frequency oscillation of cold flows are simulated using large-eddy simulation in dump combustor, and the factors influencing frequency and value are obtained.