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首页> 外文期刊>Applied optics >Validation of a rotational coherent anti-Stokes Raman spectroscopy model for carbon dioxide using high-resolution detection in the temperature range 294-1143 K
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Validation of a rotational coherent anti-Stokes Raman spectroscopy model for carbon dioxide using high-resolution detection in the temperature range 294-1143 K

机译：使用294-1143 K温度范围内的高分辨率检测验证二氧化碳的旋转相干反斯托克斯拉曼光谱模型

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摘要

Experiments were performed in the temperature range of 294 - 1143 K in pure CO2 using high-resolution rotational coherent anti-Stokes Raman spectroscopy (CARS), in the dual-broadband approach. Experimental single-shot spectra were recorded with high spectral resolution using a single-mode Nd:YAG laser and a relay imaging lens system on the exit of a 1 m spectrometer. A theoretical rotational CARS model for CO, was developed for evaluation of the experimental spectra. The evaluated mean temperatures of the recorded single-shot dual-broadband rotational coherent anti-Stokes Raman spectroscopy (DB-RCARS) spectra using this model showed good agreement with thermocouple temperatures, and the relative standard deviation of evaluated single-shot temperatures was generally 2 - 3%. Simultaneous thermometry and relative CO2/N-2-concentration measurements were demonstrated in the product gas of premixed laminar CO/air flames at atmospheric pressure. Although the model proved to be accurate for thermometry up to 1143 K, limitations were observed at flame temperatures where temperatures were overestimated and relative CO2/N-2 concentrations were underestimated. Potential sources for these discrepancies are discussed. (c) 2008 Optical Society of America.
机译：使用高分辨率旋转相干反斯托克斯拉曼光谱仪（CARS），在双宽带方法中，在纯CO2中在294-1143 K的温度范围内进行了实验。使用单模Nd：YAG激光器和中继成像透镜系统在1 m光谱仪的出口以高光谱分辨率记录了实验单发光谱。建立了用于CO的理论旋转CARS模型，用于评估实验光谱。使用该模型对记录的单脉冲双宽带旋转相干反斯托克斯拉曼光谱（DB-RCARS）光谱的评估平均温度与热电偶温度显示出良好的一致性，并且评估的单脉冲温度的相对标准偏差通常为2 -3％在大气压下预混合的层流式CO /空气火焰的产物气中，同时进行了测温和相对的CO2 / N-2-浓度测量。尽管该模型被证明对高达1143 K的测温是准确的，但在火焰温度下仍存在局限性，在火焰温度下温度被高估，而CO2 / N-2相对浓度被低估。讨论了这些差异的潜在来源。 （c）2008年美国眼镜学会。

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