A new two-temperature (2- T ) algorithm for an estimation of the temperatures in a non-uniform hot zone by absorption spectrometry with tunable diode lasers (TDLAS) is demonstrated in experiments with the Wolfhard–Parker burner. A laminar premixed flame of the burner has a planar structure with zones of relatively constant temperature and zones with pronounced temperature gradients. The temperature was evaluated by fitting the experimental absorption spectra of a H 2 O molecule by the linear combination of two single temperature spectra simulated using spectroscopic databases. The radiation of the two diode lasers generating in 7185 cm −1 and 7444 cm −1 spectral ranges crossed the flame in the direction along the slots at different heights above the burner. Temperature profiles of the flame obtained by fitting the line-of-sight TDLAS experimental spectra using a 2- T algorithm are compared with the local temperatures measured by coherent a...

中文翻译：

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用场线二极管激光吸收光谱法在非均匀区域中估计温度的2- T算法

在Wolfhard-Parker燃烧器的实验中，演示了一种新的两温（2- T）算法，该算法通过吸收光谱法和可调二极管激光器（TDLAS）估算不均匀热区中的温度。燃烧器的层流预混火焰具有平面结构，其具有相对恒定的温度区域和具有明显的温度梯度的区域。通过使用光谱数据库模拟的两个单一温度光谱的线性组合拟合H 2 O分子的实验吸收光谱来评估温度。在7185 cm -1和7444 cm -1光谱范围内产生的两个二极管激光器的辐射在燃烧器上方不同高度的狭缝方向上与火焰交叉。