Measurement of temperature by pure rotational CARS. Part 2: Application of pure rotational CARS to a gas mixture
- Nagoya Univ. (Japan). Dept. of Electronic-Mechanical Engineering
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 a gas mixture composed of several species, because the rotational lines of each species overlap at some regions in the spectrum. The authors propose a relatively easy method to deduce the temperature from the pure rotational spectrum of gas mixture. In the 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, the temperature is easily determined using the same method as for a simple gas. To examine the effectiveness of this method, temperature measurements are carried out along the centerline of a supersonic free jet of a gas mixture.
- OSTI ID:
- 276281
- Journal Information:
- Heat Transfer - Japanese Research, Vol. 24, Issue 1; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
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