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

发布时间：2018-05-07 21:22

本文选题：光学测量 + 激光光谱　；参考：《光学精密工程》2017年05期

【摘要】：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(30s)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30s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。
[Abstract]:The observation of micro jet flame morphology and the accurate measurement of important elements in the flame are of great significance to the development of micro combustion power system using the combustion characteristics of micro scale flame. In this paper, a micro nozzle jet flame experiment and an optical measurement system have been established. The experimental study of HST2 and CH_4 micro jet flame has been carried out, and the spatial distribution of the two important elements (Cho) has been measured. Firstly, the influence of camera exposure time on the flame imaging of HSP _ 2 microjet was investigated, and the variation of the flame morphology of HSP _ 2 micro-jet at different velocity was obtained. Secondly, the distribution of OH units in HST2 and CH_4 micro-jet flame was obtained by planar laser-induced fluorescence measurement under different fuel flow rates. At the same time, the distribution of Ch elements in CH_4 micro-jet flame was obtained by using SLR camera and Ch filter through long-time exposure for 30 s. The results show that the sharpness of the flame image increases with the exposure time, and the clear picture of the H2 micro-jet flame can be obtained at the exposure time of 30s, and the clear image of the distribution of the OH elements in the micro-scale flame can be obtained by using the ICCD camera with a resolution of 2048 脳 2048. The experimental results of flame morphology and important elements of micro-jet show that the numerical calculation method is accurate and reliable.
【作者单位】：中国科学院广州能源研究所;中国科学院可再生能源重点实验室;广东省新能源和可再生能源研究开发与应用重点实验室;
【基金】：国家自然科学基金重点资助项目(No.51336010) 国家重点基础研究发展计划资助项目(No.2014CB239601) 广东省科技计划资助项目(No.2016A040403095)
【分类号】：O657.3;TN249

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