Conference Paper Experimental study on turbulence partial simulation for bluff body

Katsuchi, Hiroshi  ,  Yamada, Hitoshi  ,  勝地, 弘  ,  山田, 均

Wind-induced response/vibration of a bridge deck is governed by the surrounding flow field including flow separation and reattachment. It was also pointed out that the flow field is strongly affected by a small-scale turbulence component in an approaching flow. In wind-tunnel testing, in order to simulate turbulence effects, turbulence intensity is usually simulated. However the simulation of the power spectral density (PSD) of a small-scale turbulence component (high-frequency sub-inertia range), the so-called “turbulence partial simulation” may be a more rational way. In fact, past studies suggested that the turbulence partial simulation could give a better explanation for bridge deck vortex-induced vibration response between full scale and wind-tunnel test. In this study, using “reduced turbulence intensity”, the turbulence partial simulation was experimentally investigated for bluff-body structures. Results showed that reduced turbulence intensity could represent turbulence effects to the same degree as could turbulence intensity do. In addition, it was observed that a small-scale turbulence component governed the flow field around a bluff body.
Meeting Information: First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations
形態: カラー図版あり

Number of accesses :  

Other information