Abstract
Vertical Axis Wind Turbine (VAWT) has advantages including simpler structure and significantly cheaper cost to build and maintain than the conventional Horizontal Axis Wind Turbine (HAWT), attract the most of worlds attention. However, such rotor is suffering from poor efficiency problems. The present study will consider the design improvement of a VAWT that employs a multi-blade design using both rectangular guide vanes and rotor blades arrays. As a result, an optimum formation of guide vanes as well as rotor blades needs to be found in order to enhance the power performance. The study used CFD code to obtain the flow field characteristics for purpose of evaluating the turbine performance with guide vanes and rotor blades in different shapes, at different tip speed ratio (TSR) values. From the simulation results, it was shown that the performance is apparently improved than Conventional VAWT.
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