Abstract
The flow field around a vertical axis wind turbine (VAWT) is much complicated because the blades pass in non-uniform flow field by the blade wake during rotation. This paper presents a mean for wind velocity distribution around VAWT at low tip speed ratios. According to this research, the flow field around a straight-bladed VAWT which has three blades is analyzed. The wind velocity in flow field is measured by using the Laser Doppler Velocimeter (LDV) in wind tunnel, and the wind velocity distribution is obtained under different azimuth angles. Flow field characteristics are also investigated for several values of tip speed ratio.
