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1.中国科学院 广州能源研究所, 广东 广州 510640
2.中国科学院 可再生能源重点实验室, 广东 广州 510640
3.广东省新能源和可再生能源研究开发与应用重点实验室, 广东 广州 510640
[ "李星(1984-), 男, 陕西汉中人, 博士, 副研究员, 2006年、2014年于北京交通大学分别获得学士、博士学位, 主要从事燃烧的基础研究及火焰的光学测量。E-mail:lixing@ms.giec.ac.cn" ]
赵黛青(1958-), 女, 江苏南京人, 博士, 研究员, 中科院"百人计划"入选者, 1982年于南京工业大学获得学士学位, 1985年于华东理工大学获得硕士学位, 1997年于日本东北大学获得博士学位, 主要从事燃烧基础研究、微型能源动力系统及能源科技战略方面的研究。E-mail:zhaodq@ms.giec.ac.cn ZHAO Dai-qing, E-mail:zhaodq@ms.giec.ac.cn
收稿日期:2016-11-09,
录用日期:2016-12-1,
纸质出版日期:2017-05-25
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Xing LI, Li-qiao JIANG, Hao-lin YANG, et al. Measurement of OH and CH radicals in micro-jet flames using planar laser induced fluorescence and CH filter[J]. Optics and precision engineering, 2017, 25(5): 1119-1125.
李星, 蒋利桥, 杨浩林, 等. 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. DOI: 10.3788/OPE.20172505.1119.
Xing LI, Li-qiao JIANG, Hao-lin YANG, et al. Measurement of OH and CH radicals in micro-jet flames using planar laser induced fluorescence and CH filter[J]. Optics and precision engineering, 2017, 25(5): 1119-1125. DOI: 10.3788/OPE.20172505.1119.
微射流火焰形貌观测及火焰中重要基元的准确测量,对利用微尺度火焰燃烧特性研制开发微型燃烧动力系统具有重要意义。本文建立了微喷管射流火焰实验及光学测量系统,对H
2
和CH
4
微射流火焰进行了实验研究,测量了两种重要基元(CH,OH)的空间分布。首先,探索了相机曝光时间对H
2
微射流火焰成像的影响,得到了不同流速下H
2
微射流火焰形貌的变化规律。其次,采用平面激光诱导荧光测量技术得到了不同燃料流速下H
2
及CH
4
微射流火焰中OH基元分布,同时还利用单反相机加CH滤镜通过长时间曝光(30 s)的方法获得了CH
4
微射流火焰中CH基元的分布。结果表明,火焰图像清晰度随曝光时间增加提高,曝光时间30 s时可获得H
2
微射流火焰的清晰照片;采用分辨率2 048×2 048的ICCD相机可获得微尺度火焰OH基元分布的清晰图像。微射流火焰形貌及重要基元的实验结果表明相关数值计算方法准确可靠。
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 H
2
and CH
4
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 H
2
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 H
2
and CH
4
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 CH
4
micro-jet flame. The results showed that
the clarity of flame image is promoted as the exposure time increased and a clear image of H
2
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.
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