振荡燃烧现象是在发展洁净,高效和安全动力推进系统经常会遇到的问题。本文综述了作者近些年在针对油雾振荡燃烧方面的研究工作。通过把CFD和稳定性分析结合起来,发展了预测和诊断振荡燃烧的非稳定性及其振荡频率的新方法。运用这一方法,求解系统稳态方程和线性扰动方程可得到流场的动态信息和其稳定模态,将为深入认识振荡燃烧机理和开发控制方法提供指导。
The combustion oscillations are the phenomena which we may meet in developing the clean, safe and efficient power and propulsion systems. This paper summarizes authors' systematic work on fuel spray combustion oscillations in the recent years. Combining CFD calculations and stability analysis, a new approach of predicting combustion stabilities was developed. With this approach, detailed flow information and unstable modes can be obtained by CFD and solving perturbation equations, respectively. The results provide the guidance on understanding combustion instability mechanisms and developing the control strategies.