激光吸收光谱技术测量非均匀燃烧流场研究进展

可调谐半导体激光吸收光谱技术(TDLAS)具有非侵入性、灵敏度高和时间响应快等优点,将激光吸收光谱技术与最小二乘法、计算机断层扫描重建技术(CT)相结合,可以实现对非均匀燃烧流场的分布测量。首先简要介绍了激光吸收光谱技术的发展历程及测量基本原理,然后分别对激光吸收光谱技术测量非均匀流场一维分布、二维分布的国内外研究现状及关键技术进行了综述,比较分析了二维非均匀流场诊断实验中旋转和固定两种安装模式的优缺点及相对应的光线布局,总结了用于流场二维重建的相关重建算法,最后讨论了激光吸收光谱技术测量非均匀流场研究工作的发展趋势和有待解决的相关问题。

Review on the research of non-uniform combustion field measurement using laser absorption spectroscopy technique

Tunable diode laser absorption spectroscopy (TDLAS) is characterized by non-invasiveness, high sensitivity and fast response. Combined the laser absorption spectroscopy technique with least-square fitting or computed tomography (CT), the non-uniform spatially distribution of combustion field can be measured. First, the development of laser absorption spectroscopy technique and the basic concept are summarized. Then, we review the latest development and key technologies for non-uniform flow field in one-dimensional and two-dimensional measurements. A comparison of installation mode between fixed and rotated mode for two-dimensional non-uniform flow reconstruction is analyzed. The relative optical layout and reconstruction method are summarized. Finally, the development trend and problems for non-uniform flow field based on laser absorption spectroscopy are analyzed.