D206 Wind fluctuation field and low-frequency noise formed around vertical axis wind turbines

Abstract

Flow noise of wind turbines is already on serious stage that starts to restrict the spread of wind power generation. For vertical axis wind turbines for urban area, the noise-causing mechanism is more important to be clarified because of near-distance impact to people. We measured flow fields around several models of blades using particle image velocimetry and hot wire velocimetry in order to evaluate the type and the source of flow noise in the case of vertical axis wind turbines.