純回転CARSによる温度計測に関する研究 : 第2報,混合気体への応用

概要

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It is easy to deduce the temperature in the case of a simple gas from the spectrum of pure rotational CARS (coherent anti-Stokes Raman scattering), but not in the case of gas mixture composed of several species, because the rotational lines of each species overlap at some regions in the spectrum. We propose a relatively easy method to deduce the temperature from the pure rotational spectrum of gas mixture. Air, which consists of oxygen and nitrogen, is selected as an example of gas mixture. In our method, a spectrum is partitioned into some sections and the ratios between line intensity of nitrogen and that of oxygen are calculated theoretically for each section. Once the spectrum of air is separated into those of nitrogen and oxygen, temperature is easily determined using the same method as for the simple gas. To examine the effectiveness of this method, temperature measurements are carried out along the centerline of a supersonic free jet of gas mixture.
社団法人日本機械学会の論文
1995-02-25