Effects of free-stream turbulence and corner shape on the galloping instability of square cylinders

摘要

The in?uence of corner shaping and turbulence intensity on the aerodynamic stability of square cylinders is studied with a quasi-static approach. Beside the sharp-edge corner condition, two different rounded-corner radii (r/b=1/15 and 2/15) are considered. The stability analyses are based on aerodynamic coef?cients derived through static wind tunnel tests in smooth and turbulent ?ow, in the Reynolds number range between 1.7×10~4and 2.3×10~5. The experimental data are employed to determine the stability boundaries depending on the angle of attack and - when relevant - on the Reynolds number.