Gunma University Graduate School of Engineering
Gunma University Faculty of Engineering
Gunma University
Maebashi Technical High School
Gunma University Faculty of Engineering
JAXA Special Publication: Proceedings of 39th Fluid Dynamics Conference/Aerospace Numerical Simulation Symposium 2007
巻
JAXA-SP-07-016
ページ
143 - 148
発行年
2008-02-29
抄録（英）
At our laboratory, radiation characteristics of air micro-plasmajets have been studied systematically. Up to the present, we measured radiation of the plasmajets mainly on a flow axis at atmospheric and low pressures. Temperatures were estimated with the aid of spectral matching method and Boltzmann-plot method. Rotational temperatures were estimated 5,000 to 8,000 K, and vibrational temperatures 34,000 to 70,000 K, both with some axial variations. Electronic excitation temperatures of oxygen atomic lines were estimated 5,000 to 9,300 K. It was found that the rotational temperatures had large difference from the gas temperature based on an empirical formula for a supersonic free-jet, but decreased downstream in the expansion flow region, and also the vibrational temperatures were much higher than those expected. The present paper showed the preliminary results of radiation characteristics at an off-axis position in the expansion flow region, too.
低圧空気極小プラズマジェットの膨張流領域における放射特性
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