NUMERICAL ANALYSIS OF AERODYNAMIC NOISE GENERATED BY INTERACTION BETWEEN KARMAN VORTEX AND CYLINDER WING

Abstract

This paper studies aerodynamic noise emitted from the vertical axis wind turbine, equipped with a wing to control the vortex from the cylinder. Aerodynamic noise was investigated by changing dimensionless ratio G/D where G the gap between the cylinder and the wing, and D the cylinder diameter. Aerodynamic noise was evaluated by time derivative of pressure fluctuations on the wing surface. Consequently, the frequency analysis is performed with FFT for the pressure fluctuation on the wing surface, aerodynamic noise tends to be reduced if G/D is more than 1.5.