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首页> 外文期刊>Applied optics >Comparison of gas temperatures measured by coherent anti-Stokes Raman spectroscopy (CARS) of O_(2) and N_(2)
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Comparison of gas temperatures measured by coherent anti-Stokes Raman spectroscopy (CARS) of O_(2) and N_(2)

机译：通过O_（2）和N_（2）的相干反斯托克斯拉曼光谱（CARS）测量的气体温度比较

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We investigate the accuracy of temperature measurements by coherent anti-Stokes Raman spectroscopy (CARS) of O_(2) and use measurements taken with N_(2) CARS and a thermocouple for comparison. Scanning vibrational CARS spectra of O_(2) and N_(2) were recorded over a broad range of temperatures: between 294 K and 1900 K in air that was heated in a tube furnace and at approximately 2450 K in a fuel-lean CH_(4)-O_(2)-N_(2) flame. Temperatures were derived from least-squares fits of simulated and experimental spectra. Both the fundamental vibrational band and the first hot vibrational band were included in fitting. In the case of the tube furnace, the N_(2) and the O_(2) CARS temperature measurements agreed to within 3%, and results were similar with the thermocouple; in the flame the agreement was to within 1%. We conclude that, for cases in which O_(2) is present in sufficient concentrations (≈10% or greater), the accuracy of O_(2) thermometry is comparable with that of N_(2).
机译：我们调查相干反斯托克斯拉曼光谱（O_（2））的温度测量的准确性，并使用N_（2）CARS和热电偶进行的测量进行比较。在很宽的温度范围内记录O_（2）和N_（2）的振动CARS扫描光谱：在管式炉中加热的空气中294 K至1900 K之间以及在贫燃料的CH_中约2450 K处4）-O_（2）-N_（2）火焰。温度是从模拟和实验光谱的最小二乘拟合得出的。基本振动带和第一热振动带都包括在装配中。在管式炉的情况下，N_（2）和O_（2）CARS温度测量值一致在3％以内，并且与热电偶的结果相似。在火中，协议达成了1％以内。我们得出的结论是，对于O_（2）以足够的浓度（≈10％或更高）存在的情况，O_（2）测温的精度与N_（2）相当。

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