PIVを用いた流れの可視化と風圧の同時測定による細長い三次元柱周りの流れと空気力に関する実験的研究

概要

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The wind flows around a three-dimensional slender cylinder model and the wind pressures acting on it were measured synchronously by Particle Image Velocimetry (PIV) and simultaneous multi-pressure measurements. Symmetrical mean flow distributions were obtained from piles of instantaneous flow distributions. The relations between the separated shear layers and the wind pressures on the side of the model were shown by synchronous records between instantaneous flows and wind pressures. The correlations between the perpendicular components (V components) of the flow around the model and the lift forces on it were highest. The correlation on the centerline in the wake also had spatial periodic fluctuations like a sine wave. It can be considered that the spatial periodic fluctuations in the correlation were caused by the vortex shedding from the model, because of a high relationship between the spatial period of the fluctuations and the reciprocal Strouhal number.
社団法人日本建築学会の論文
2003-11-30