冲压发动机突扩型燃烧室压力振荡问题(综述)

EXPERIMENTAL STUDY AND MECHANISM ANALYSIS ON LONGITUDINAL PRESSURE OSCILLATIONS IN DUMP COMBUSTORS OF RAMJETS

关键词:  振荡燃烧  冲压式喷气发动机  发动机试验  压力测量  燃烧稳定性

Key words:  Oscillation burning  Ramjet engine  Engine test  Pressure measure-ment  Combustion stability

摘要:

本文综述了近年来在控制冲压发动机突扩型燃烧室高振幅、低频压力振荡方面所取得的最新技术进展.介绍了用于抑制压力振荡的被动和主动控制技术.详细地讨论了燃烧室内声波动特性、剪切层流动不稳定性和热释放过程之间的相互作用以及对高振幅、低频压力振荡的影响,并根据当前在该领域的研究结果提出了几点建议.

Abstract:

A survey on the latest development to control high amplitude, low frequency pressure oscillations in dump ramjet combustors, and the passive and active control techniques to suppress the oscillations are presented in this paper. Especially, the interactions among the acoustic properties, largescale structures in the shear layer and heat release process in combustors as well as their influence upon the excited high amplitude, low frequency pressure osci llations are discussed in detail. Some suggestions are also presented based on the current researches in this field.