Abstract
In this study, the influence of the relative ratio between the duct width W and the wind turbine diameter D on the duct-flow power generation as well as the relationship of the power generation with the wind turbine relative position to the duct exit are investigated by two-dimensional CFD. The tendency of power coefficient regarding the Y direction (normal to main flow) is reversed as the rotor goes downwind, when W/D is 1 or more. However, the reverse does not take place when W/D is 0.5. The energy recovery rate is highest when the rotor diameter is two times as large as the duct width (W/D = 0.5). In this case, the rotor gives little influence on the duct.
