Temperature and water mole fraction measurements by time-domain-based supercontinuum absorption spectroscopy in a flame
Temperature and water mole fraction measurements by time-domain-based supercontinuum absorption spectroscopy in a flame
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DOI：
10.1007/s00340-014-5964-1
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发表时间：
2015-01-01
影响因子：
2.1
通讯作者：
Will, Stefan
中科院分区：
文献类型：
--
作者：
Werblinski, Thomas;Mittmann, Frank;Will, Stefan
在这篇手稿中，我们提出了第一个定量的多标量测量基于时域的超连续吸收光谱在火焰中。温度和摩尔分数同时确定从宽带光谱范围从1,340到1,485 nm的多峰最小二乘拟合实验和模拟光谱之间。为此，使用了最全面的数据库，即Barber-Tennyson数据库（BT 2）和HITRAN 2012的组合。BT 2中列出的线强度值与基于最新HITRAN数据库中的上旋转量子数J的平均加宽系数和温度指数相结合，以精确地模拟每个转变的线形函数。通过实验光谱与理论光谱的直接比较，重建了McKenna型燃烧器一维预混火焰的温度和摩尔分数随高度的分布。为了验证，将获得的温度数据与通过相干反斯托克斯拉曼散射确定的轮廓进行比较。
In this manuscript, we present the first quantitative multi-scalar measurements by time-domain-based supercontinuum absorption spectroscopy in a flame. Temperature and mole fraction are determined simultaneously from broadband spectra ranging from 1,340 to 1,485 nm by a multi-peak least square fit between experiments and simulated spectra. To this end, a combination of the most comprehensive databases, namely the Barber-Tennyson database (BT2) and HITRAN2012, is used. Line strength values listed in BT2 are combined with averaged broadening coefficients and temperature exponents based on the upper rotational quantum number J from the latest HITRAN database to precisely model the line shape function for each transition. The height-dependent temperature and mole fraction profiles of a premixed one-dimensional flame of a McKenna type burner are reconstructed by direct comparison of experimental spectra with theory. For verification, the temperature data obtained are compared with a profile determined by coherent anti-Stokes Raman scattering.