風力タービン用翼型に発生するはく離泡及び翼特性の数値解析(流体工学,流体機械)

概要

論文の詳細を見る
In order to predict and understand the low Reynolds number phenomena observed on wind turbine blades, especially formation of separation bubbles, the flow fields around an airfoil for wind turbines are numerically analyzed in the condition that a separation bubble is observed in wind tunnel experiments. The results from three-dimensional unsteady analysis using a finer grid system show a discontinuity in the pressure coefficient distribution around the airfoil. This discontinuity captures the formation of a separation bubble at a certain location, which shows good agreements with experimental results. From visualization of flow fields, the mechanism of separation bubbles is recognized as follows: after vortex formation and growth in the separated boundary layer, the vortex distortion and transition to 3-dimensionality follow, then the flow field becomes fully turbulent. The power spectrums of pressure field from experiments support this feature.
一般社団法人日本機械学会の論文
2002-12-25