D231 高エンタルピ窒素気流中の衝撃波・衝撃波干渉(D-23 高エンタルピー流(1),一般講演)

概要

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When a re-entry vehicle enters the atmosphere, the temperature of air flow around the body becomes very high, where the phenomenon of thermal and chemical nonequilibrium occurs. Since the heat flux is increased by shock/shock interaction, considerable care has to be given to treat a multiple-body. In this study, shock/shock interaction in nonequilibrium nitrogen gas flow was investigated. In the experiment, two copper pipes were used to produce a shock/shock interaction flow. Vibrational and rotational temperatures were spectroscopically measured. The shape of bow shock in front of the model at the back can be changed by the location of an impinging shock. As a result, the most intensive of luminescence was observed at θ=-6deg. Vibrational and rotational temperatures were increased by the shock wave or the shock/shock interaction. In the case of θ=-6deg, the degree of nonequilibrium by shock/shock interaction became largest, especially, the intensity of N^+_2 spectrum.
日本流体力学会の論文
2004-08-09