EFFECT OF DIFFUSER WITH FLANGE ON PERFORMANCE OF CROSS FLOW WIND TURBINE

Abstract

We developed a wind concentrator for a cross flow wind turbine consisting of an arc-shaped wind-shield and a diffuser with a flange. By conducting wind tunnel experiments (WTE) and computational fluid dynamics (CFD) simulations, we investigated the effects of this wind concentrator on the performance of the cross-flow wind turbine. We found that with the flange height h became higher, the power coefficient increased from h/D = 0.3125 to h/D = 0.875 (D: diameter of the wind turbine). In addition, we found that with an increase in the semi-open angle φ, the power coefficient generally increased from φ = 0° to φ = 40°.