高速非平衡窒素流中における球頭物体澱み流線上の振動・回転温度

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書誌事項

タイトル別名
  • Rotational and Vibrational Temperature of High-Speed, Nonequilibrium Nitrogen Flow along the Stagnation Streamline of Hemi-Sphere Cylinder.
  • コウソク ヒヘイコウ チッソリュウ チュウ ニ オケル キュウトウブッタイ ヨドミ リュウ センジョウ ノ シンドウ カイテン オンド
公開日
2001
DOI
  • 10.2322/jjsass.49.375
公開者
一般社団法人 日本航空宇宙学会

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説明

An arc-heated wind tunnel has been used to produce nitrogen gas flow with high enthalpy to investigate physical phenomena along the stagnation streamline of a hemi-sphere cylinder with a diameter of 10 mm. The rotational and vibrational temperatures were measured by a spectroscopic method. The rotational temperature took a maximum value of 800 K at a location 2 mm upstream of the stagnation point, while the vibrational temperature showed a nearly constant value of 5, 500 K, which was much higher than the rotational temperature. This means that the present flow is in the state of thermal nonequilibrium. For comparison, the flow was numerically simulated by using the measured data as boundary conditions. As a result the calculated translational-rotational temperature was 80 K higher than the experimental data. Vibrational temperature had a tendency to decrease along the centerline of the wind tunnel, due to insufficient energy exchange between translational-rotational and vibrational energy.

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