基于火焰结构特征提取的振荡燃烧故障快速检测技术  

Rapid detection technique of oscillating combustion faults based on flame structure feature extraction

作　　者：于倩倩 雷庆春 吴文赛 王玮[2] 范玮[1] YU Qianqian;LEI Qingchun;WU Wensai;WANG Wei;FAN Wei(Scholl of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710032,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《推进技术》2024年第8期216-225,共10页Journal of Propulsion Technology

基　　金：国家科技重大专项(HT-J2019-I-0003-0004)。

摘　　要：随着先进燃气轮机不断向高负荷、低排放的趋势发展,燃烧室内发生振荡燃烧的概率持续增大,亟需发展新的检测技术,对振荡燃烧故障进行精确、快速检测。本文提出了基于火焰化学发光图像采集、本征正交分解特征提取、连续小波变换时频分析的振荡燃烧快速检测技术,该技术具有同时解析频谱和频谱随时间演变的能力。通过实验验证,对于振荡到稳定、稳定到振荡、一个主频到另一个主频等多种情况,利用火焰图像本征正交分解得到的模态时间系数,均可获得比压力信号更快的检测速度。在本文涉及的工况,检测速度可提升60%以上。With the development of advanced gas turbines towards high load and low emission,the proba⁃bility of inducing combustion instability in the combustion chamber continues to increase.It has been long de⁃sired to develop new detection technologies for accurate and rapid detection of combustion instability faults.In this paper,a rapid detection technique of combustion instability based on flame chemiluminescence image acqui⁃sition,proper orthogonal decomposition feature extraction and continuous wavelet transform time-frequency anal⁃ysis is proposed.The technique can resolve the frequency domain and its time evolution simultaneously.Through experimental verification,it is found that for oscillations to stability,stability to oscillation,one main frequency to another main frequency and other mode transition processes,the mode time coefficients obtained by using the proper orthogonal decomposition of flame images can obtain faster detection speed than the pressure signal.The improvement of the detection speed is more than 60%in the tested cases.

关 键 词：振荡燃烧 化学发光 本征正交分解 连续小波变换 快速检测 

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] TK14[动力工程及工程热物理—热能工程]