壁面パルスジェット内に生成された縦渦の流動機構　第１報　単孔パルスジェットの吹出し条件

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タイトル別名
  • Flow Behavior of the Longitudinal Vortex Generated in a Pulsed Wall Jet. 1st Report. Injection Condition of a Single Wall Jet.
  • ヘキメン パルス ジェットナイ ニ セイセイサレタ タテ ウズ ノ リュウドウ

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説明

A Vortex Generator Jet (VGJ) in a turbulent boundary layer has been investigated, since it has a significant potential for the active control of boundary layer stall. This paper describes the pulsed VGJ through a single hole which generates periodic longitudinal vortices in the boundary layer. Phase-averaged streamwise velocity and wall shear stress were measured by a flow sensor with a high response. Under some pulsed injection conditions, higher velocity is observed in the region downstream of the injection hole and close to the wall at the end of injection. As a result, phase-averaged wall shear stress has a peak at the end of injection. The optimum injection condition is also obtained.

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