Small scale vertical axis wind turbines are capable of capturing a large proportion of the energy contained in short period gusts of wind. This makes them ideally suited to operation in the turbulent wind environment found in built up areas. If wind turbines are to be installed in an urban area they will inherently be close to people meaning that noise is a particularly significant issue. Current understanding of the mechanisms of noise generation on vertical axis wind turbines is very limited.
This work investigates the sources of noise using two methods. The principal approach involves using a phased acoustic array to locate the noise sources on a model scale vertical axis wind turbine. These experiments are supported by aeroacoustic simulations of the sound field produced by a rotating point force representation of the wind tunnel model.