D243 鈍頭物体まわりの超音速弱電離プラズマ窒素気流の振動・回転温度について(D-24 高エンタルピー流(2),一般講演)

概要

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High enthalpy nitrogen supersonic gas flow was generated by an arc-heated wind tunnel, and the emission spectra of the flow were investigated by a spectroscopic measurement along the stagnation line of a hemisphere model with the diameter of 10mm. The vibrational temperature was evaluated by the Boltzmann plot method based on the second positive band system of nitrogen molecules and became a nearly constant with the value of 4,500K in the flow field. In the case of no model in the flow, the similar results to those for the hemisphere model were also obtained. On the other hand, rotational temperature was 1,500K lower than the vibrational temperature. It showed that the nitrogen flow was nonequilibrium at least between vibrational and rotational temperature.
日本流体力学会の論文
2004-08-09