光学精密工程2017，Vol.25Issue(5)：1119-1125,7.DOI:10.3788/OPE.20172505.1119
利用平面激光诱导荧光技术及CH滤镜测量微喷管射流火焰OH及CH基元
Measurement of OH and CH radicals in micro-jet flames using planar laser induced fluorescence and CH filter
摘要
Abstract
The observation of micro-jet flame shape and measurements of important radicals in micro-jet flame are of great significance to the research and development of micro energy and power system based on combustion characteristics of micro-jet flames.In this work, an optical measurement system of mcro-jet flames was established experimentally to study micro-jet flames using H2 and CH4 as fuels and to measure the spatial distribution of two important radicals, CH and OH.Firstly, the effect of exposure time of camera on images of the H2 micro-jet flames was explored, obtaining the variation of micro-jet flame shape under different flow velocities.Then, the Laser Induced Predissociative Fluorescence (OH-PLIF) technique was applied to obtain the distribution of OH radical in H2 and CH4 micro-jet flames under different fuel flow velocities, meanwhile, a Digital Single Lens Reflector (DSLR) plus a CH filter with a long time exposure (30 s) was employed to obtain the distribution of CH radical in CH4 micro-jet flame.The results showed that, the clarity of flame image is promoted as the exposure time increased and a clear image of H2 micro-jet flame is acquired when exposure time is 30 s;a clear image of distribution of OH radical in micro-scale flames is captured via an ICCD camera with a resolution of 2 048×2 048.The experimental results indicate that the numerical computation of micro-jet flame shape and important radicals is accurate and reliable.关键词
光学测量/激光光谱/平面激光诱导荧光/微射流火焰/OH/CHKey words
optical measurement/laser spectrum/planar laser induced fluorescence/micro-jet flame/OH/CH分类
信息技术与安全科学引用本文复制引用
李星,蒋利桥,杨浩林,张京,赵黛青..利用平面激光诱导荧光技术及CH滤镜测量微喷管射流火焰OH及CH基元[J].光学精密工程,2017,25(5):1119-1125,7.基金项目
国家自然科学基金重点资助项目(No.51336010) （No.51336010）
国家重点基础研究发展计划资助项目(No.2014CB239601) （No.2014CB239601）
广东省科技计划资助项目(No.2016A040403095) （No.2016A040403095）
