Evaluation of effect of cylinder position and Reynolds number on aerodynamic coefficient of cylinder with protrusion

Abstract

As the fundamental study for establishing an amplitude evaluation method for Rain-Wind-Induced-Vibration, the aerodynamic coefficients of a cylinder with a protrusion were measured. According to the results, the aerodynamic coefficients which were nondimensionalized by orthogonal wind speed towards the cylinder were corresponded when the Reynolds numbers which were calculated by inlet wind speed were the same. The aerodynamic coefficient which is used in the numerical simulation of RWIV should be measured in the condition of the same Reynolds number as real phenomena and without yawing angle.