N_2^+1-バンドを用いた空気マイクロプラズマジェットの温度計測(流体工学,流体機械)

概要

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Spectroscopic measurements of micro-air plasma-jets generated at low pressures were performed at several points on flow axis, using a spectrometer in the wavelength region of 200 to 900 nm. The N_22+ bands and N_2^+1- bands were predominant in the region of 280 to 480nm, and atomic lines of N and O in the visible and infrared regions. Temperatures of the plasma-jets were estimated by applying a spectral matching method to N_2^+1- bands along a flow axis for low-pressure conditions. Rotational temperatures for N_2^+1- bands were 6000 to 7000K, and vibrational temperatures 25000 to 28000K, almost independent of pressures and axial positions. It was found that the rotational temperatures measured had great difference from the gas temperature based upon an empirical formula for supersonic free jets, and also the vibrational temperatures were much higher than those expected.
社団法人日本機械学会の論文
2006-03-25