基于卡塞格林原理的火焰自由基测量系统  

System based on Cassegrain optical principle applicable to measure chemiluminescence in flame

作　　者：钟英杰[1] 王根娟 王明晓[1] 王炜豪 邓凯[1] ZHONG Ying-jie WANG Gen-juan WANG Ming-xiao WANG Wei-hao DENG Kai(Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

机构地区：[1]浙江工业大学能源与动力工程研究所,浙江杭州310014

出　　处：《浙江大学学报（工学版）》2017年第5期1044-1050,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51106139);浙江省科技厅资助项目(2014C31034)

摘　　要：为了拓展火焰自由基荧光强度的测试方法,基于卡塞格林光学原理设计火焰非接触式定点测量系统,该系统可以实现对火焰自由基荧光强度的三维局部定点测量,具有定点聚焦及动态信号采集的功能.利用逆光路原理对自行设计的卡塞格林光线定点采集装置的聚焦功能进行验证,实验结果表明,该装置可以采集直径为0.382mm,长为1.628mm区域内的光线,具有三维高空间分辨率.基于甲烷部分预混火焰的OH基、CH基的光强随半径方向的分布数据分析,证明卡塞格林光线定点采集装置在火焰自由基荧光强度中定点测量的有效性与高空间分辨率特性.A non-contact system based on Cassegrain optical principle was developed in order to expend thetest method of radical species in flames. The system can detect chemiluminescence of local combustionreactions and obtain continuous signals. It is very suitable to acquire dynamic signals on a point. Theeffective light-collection volume was experimentally investigated by sending visible light through the devicein the reverse direction. The effective light-collection volume＇s diameter is only 0. 382 mm and its length is1. 628 mm. OH-radical and CH-radical chemiluminescence in CH4/Air premixed flame were monitored inorder to demonstrate the performance of the system. The experimental results show that the system hashigh spatial resolution and is practicable in the study of flame.

关 键 词：火焰自由基 荧光强度 卡塞格林光学系统 定点测量 光电倍增管 

分 类 号：TK16[动力工程及工程热物理—热能工程]