Abstract
Cross-flow wind turbine of vertical axis drag-type has inefficient part of swept area that doesn’t work because, in the part, the blades are moving in the opposite direction to the wind. However, in our study, the cross-flow wind turbine in the flow with separation near the edge of structure such as building showed higher performance than in uniform flow and by using a flow deflector the flow with separation near the edge could be improved to make the performance even higher by 30 to 50％. From these results, the optimum flow of cross-flow wind turbine was figured out.
In this study, the attempt to get the optimum flow of cross-flow wind turbine in uniform flow was made by using a casingwith two flow deflectors called the dual flow deflector（DFD）casing and the performance test and numerical flow analysis of cross-flow wind turbine with the DFD casing were done.
