N_2(1+)バンドから求めた衝撃波背後の窒素分子の緩和現象(高エネルギー(1),一般講演)

概要

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To investigate influence of electronic state on internal relaxation of nitrogen molecule behind shock waves, spectroscopic measurement has been conducted using free piston double diaphragm shock tube. molecular spectrum of N_2(2+) system and N_2(1+) system are taken by emission spectroscopy, and rotational and vibrational temperatures based on N_2(2+) system and N_2(1+) system are determined by spectrum fitting method using SPRADIAN. Finally spatial distribution of temperatures are obtained and compared with Park's two temperature model. Measured rotational temperatures are nonequilibrium with predicted translational temperature just behind shock waves. Contrary, measured vibrational temperatures are equilibrium with predicted vibrational temperature. There is no big difference between temperatures derived from N_2(2+) and N_2(1+) in this experiment. This result shows electronic state doesn't affect internal relaxation of nitrogen molecule in moderate shock velocity.
日本流体力学会の論文
2008-09-04