组合发动机加力燃烧室火焰状态光学图像监测方法研究
Optical image monitoring method for flame state of combined engine afterburner
罗雨馨 1曹振 1彭江波 1杨超博 1张樱娜 1胡斌 2朱涛 3李晓晖 1刘文备 1亓金浩 1于欣1
作者信息
- 1. 哈尔滨工业大学 航天学院 激光空间信息全国重点实验室,黑龙江 哈尔滨 150001;哈尔滨工业大学 航天学院 光电子技术研究所,黑龙江 哈尔滨 150001
- 2. 中国科学院工程热物理研究所,北京 100190;中国科学院大学 航空宇航学院,北京 100190
- 3. 江苏中科能源动力研究中心,江苏 连云港 222069
- 折叠
摘要
为防止发动机在运行过程中出现熄火等异常现象,本文报道了一种基于光学图像的非接触式发动机火焰实时在线监测方法,并在组合发动机加力燃烧试验台上开展了试验验证.利用高速相机采集组合发动机加力燃烧室内火焰的OH*自发辐射图像,通过内嵌在现场可编程逻辑阵列(Field Program-mable Gate Array,FPGA)板中的图像处理系统实时处理图像并提取表征燃烧状态的火焰特征,利用阈值判断算法实现火焰状态的在线监测,其响应时间最快约为25 ms.此外,研究发现在临近熄火阶段,火焰面积脉动加快,火焰强度波动加剧,监测系统的高灵敏性使其具有捕捉熄火特征的能力,有望在未来实现对熄火等异常燃烧状态的预警.
Abstract
In order to prevent the engine flameout during operation,the real-time flame state monitoring in the combustion chamber is crucial.This paper presents a non-intrusive,real-time online engine flame monitor-ing method based on the optical images,and the experimental validation is conducted on a combined engine after-burner.A high-speed camera captures OH* spontaneous emission images of the flame in the afterburner combus-tion chamber,which are processed in real time using an image processing system embedded in an FPGA(Field Programmable Gate Array)board.This system can extract flame features that characterize the combustion condi-tion,enabling online monitoring of the flame state with a response time of approximately 25 ms using a threshold judgment algorithm.Moreover,it was observed that during the flameout stage,the flame area pulsation accelerat-ed,and the flame intensity fluctuated more intensely.The monitoring system with high sensitivity enables the de-tection of these flameout characteristics,which could potentially facilitate early warning of abnormal combustion states such as flameout in the future.
关键词
OH*自发辐射/燃烧诊断/发动机火焰监测/火焰特征提取/非接触测量/火焰状态识别Key words
Spontaneous emission of OH*/Combustion diagnosis/Engine flame monitoring/Flame fea-ture extraction/Non-contact measurement/Flame state recognition引用本文复制引用
出版年
2025
NETL
NSTL
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