中文摘要：

在复杂的燃烧流场等试验研究中，平面激光诱导荧光技术（PLIF）被用于特定气体分子浓度分布、火焰构造和温度分布的测量。基于双色激光诱导荧光测温原理，设计了双激发PLIF系统，选取两条合适的OH自由基激励线，定量测量了甲烷一空气预混火焰的二维瞬态温度场分布。实验中，通过对两个激光脉冲功率和激光轮廓分布监控以及双ICCD成像的空间位置校正，提高了测量的精细程度。给出了测量结果，并与稳态燃烧场火焰的热电偶测量结果进行了对比，不确定度优于5％。这种二维瞬态测温技术能够满足超声速燃烧诊断中的应用。

英文摘要：

Planar laser induced fluorescence （PLIF） is the most intuitive and effective measurement technology, which shows a broad application prospects in the complex combustion flow field diagnostics because of its abundant information, non-contact, high spatial and temporal resolutions, visualization and other advantages. PLIF technology can provide a two-dimensional imaging and many parameters such as temperature, velocity, component concentration and pressure of some special cross-section in the flame and other flows. A two-excitation planar laser-induced fluorescence （PLIF） system was set up based on the two line PLIF technology. Two dimensional instantaneous temperature distribution of premixed CHJair flame was measured quantitative by picking two proper spectrum lines. In experiments, by acquiring the power of laser pulses and the profile distribution and revising the spatial positions of the ICCD imaging, the precision was elevated. The measurement results are more precise compared with the results of thermoelectric couple and the uncertainty is less than 5%, which can suffice with the applications in supersonic combustion diagnostics.