EVALUATION OF FLOW STRUCTURES ABOVE AND WIND PRESSURES ON THE ROOF OF A CUBIC STRUCTURE BY SYNCHRONOUS MEASUREMENTS OF THE FLOW AND PRESSURES

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  • 流れと風圧の同時測定による立方体屋根面上流れの時空間構造と風圧特性の評価
  • ナガレ ト フウアツ ノ ドウジ ソクテイ ニ ヨル リッポウタイ ヤネメン ジョウ ナガレ ノ ジクウカン コウゾウ ト フウアツ トクセイ ノ ヒョウカ

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In order to clarify characteristics of temporal-spatial flow structures above and wind pressures on the roof of a cubic structure, a wind tunnel experiment was carried out in two types of turbulent boundary layers. The flow was measured by Particle Image Velocimetry (PIV) system and simultaneous multi-pressure measurements on the surface were also performed. The time-averaged separation bubble on the roof had flat shape with a gradual curvature. When the intensity of turbulence of the approaching flow was large, and strong local negative pressure was generated in the windward edge corner, a flat conical vortex was formed, and the spatial structure of the flow was different from the time-averaged flow.

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