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在不稳定热释放和声波相互耦合作用下而产生的燃烧不稳定现象,表现为振荡燃烧的形式,常发生于火箭发动机、航空发动机加力燃烧室以及地面燃气轮机等装置当中,会对结构引起很严重的破坏。本文总结了当前关于燃烧不稳定问题的机理以及控制方法的研究进展。目前来看,关于燃烧不稳定的机理研究方面,包含实验研究以及数值方法研究。实验方面,有rijketube热声不稳定实验,还有模拟真实燃烧室环境的燃烧实验。数值方面的工作,包括线化的热声不稳定模型,以及对火焰进行描述的解析模型和大涡模拟等方面的工作。同时,人们尝试了各种抑制不稳定的方法。控制方法包含两大类,即:主动控制方法以及被动控制方法。主动控制方法在理论研究方面取得了重大成果,然而,由于其实现上需要复杂响应系统、执行机构,因此,距离实际工程应用还很遥远。而被动控制方法,例如,亥姆赫兹共振腔,以及穿孔板等装置,在工程上得到了很好的应用。
The unstable combustion caused by the unstable heat release and the mutual coupling of acoustic waves manifests itself in the form of oscillatory combustion, which often occurs in devices such as rocket engines, aero-engine afterburners and surface gas turbines, Serious damage. This paper summarizes the current research progress on the mechanism of combustion instability and control methods. For now, the mechanism of combustion instability, including experimental studies and numerical methods. Experiments, there rijketube thermoacoustic instability experiment, as well as simulation of real combustion environment combustion experiment. Numerical work, including linearized thermoacoustic instability model, as well as the description of the flame analysis model and large eddy simulation work. At the same time, people have tried various ways of suppressing instability. Control methods include two categories, namely: active control method and passive control method. The active control method has made great achievements in theoretical research. However, due to the complicated response system and implementing agency required for its implementation, it is still far away from the actual engineering application. Passive control methods, such as Helmholtz resonator, and perforated plate and other devices, have been well applied in engineering.