基于GIM的加力燃烧室振荡燃烧频率预测方法与试验验证  

Prediction Method and Test Verification of Oscillating Combustion Frequency in Afterburner Based on GIM

作　　者：刘思棋 韩启祥[1] LIU Siqi;HAN Qixiang(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2023年第3期96-100,共5页Machine Building & Automation

基　　金：国家科技重大专项(2017-Ⅲ-0008-0034)。

摘　　要：以加力燃烧室为对象,建立基于GIM的加力燃烧室不稳定燃烧数学模型,并利用Matlab/Simulink开发用于预测加力燃烧室振荡燃烧频率的计算程序。建立模型加力燃烧室振荡燃烧试验系统,利用高速摄影图像的FFT分析,从实验的角度验证预测方法的准确性。结果表明该方法对加力燃烧室振荡燃烧频率的预测误差为3.96%。在此基础上,运用该方法研究火焰稳定器堵塞比对于振荡燃烧频率的影响,结果表明:随着堵塞比增大,振荡燃烧频率不断减小;当堵塞比小于0.25时对频率的影响可以忽略,当堵塞比大于0.5时,对频率的影响较大。Based on GIM,the mathematical model of unstable combustion in afterburner is established,and the calculation program for predicting the oscillating combustion frequency of afterburner is developed by using Matlab/Simulink.A model afterburner oscillating combustion test system is established,and the accuracy of the prediction method is verified by FFT analysis of high-speed photographic images from the perspective of experiment.The results show that the prediction error of oscillating combustion frequency of afterburner by the proposed method is 3.96%,based on which,the influence of the blockage ratio of the flame stabilizer on the oscillating combustion frequency is studied by the method.The results show that the oscillating combustion frequency decreases with the increase of the blockage ratio.When the blockage ratio is less than 0.25,its influence on the frequency can be ignored,and when the blockage ratio is greater than 0.5,the influence over the frequency becomes greater.

关 键 词：燃烧不稳定 加力燃烧室 波动方程 预测模型 图像处理技术 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]