Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in premixed jet flames
Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in premixed jet flames
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DOI：
10.1007/s00340-018-6984-z
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发表时间：
2018-06-01
影响因子：
2.1
通讯作者：
Spearrin, R. Mitchell
中科院分区：
文献类型：
--
作者：
Wei, Chuyu;Pineda, Daniel I.;Spearrin, R. Mitchell
本文提出了一种利用中红外光源的层析激光吸收光谱技术，作为一种定量方法，可以在空间上解析与燃烧系统相关的小直径反应流中的物质和温度分布。在这里，可调谐量子和带间级联激光器被用于光谱解析在4.98和4.19 m附近选择的旋转振动跃迁，分别测量CO和它们的振动温度，在先导预混射流火焰中。详细介绍了典型乙烯-空气射流火焰热化学结构轴向和径向分布重建的信号处理方法。进一步证明了该方法可以定量区分不同的湍流状态。
A tomographic laser absorption spectroscopy technique, utilizing mid-infrared light sources, is presented as a quantitative method to spatially resolve species and temperature profiles in small-diameter reacting flows relevant to combustion systems. Here, tunable quantum and interband cascade lasers are used to spectrally resolve select rovibrational transitions near 4.98 and 4.19 m to measure CO and , respectively, as well as their vibrational temperatures, in piloted premixed jet flames. Signal processing methods are detailed for the reconstruction of axial and radial profiles of thermochemical structure in a canonical ethylene-air jet flame. The method is further demonstrated to quantitatively distinguish between different turbulent flow conditions.