Ecology, Environment and Conservation Paper

Vol 24, Feb. Suppl. Issue 2018; Page No.(237-247)

CFD AND EXPERIMENTAL ANALYSIS OF SAVONIUS VERTICAL AXIS WIND TURBINE

T. Sivakumar, K. Sivakumar, B. Sivaraman, C. Sivan Raj and A. Kuppu Raj

Abstract

This paper presents the study of flow over Savonius Wind Turbine consisting two bladed and three bladed configurations and its performance. For this kind of wind turbine, axis of rotation is almost perpendicular to relative wind. Due to continuous variation of flow angle with respect to pitch angle, strong unsteady effects like flow separation, vortex shedding, etc., are observed, in order to evaluate the performance. Comparison and investigation are carried out to appraise the performance on two bladed Savonius Wind Turbine of with three bladed configurations through CFD Analysis. For this purpose, Two bladed VAWT (Vertical Axis Wind Turbine) and Three bladed VWAT are designed with Aspect Ratio (D/H) as one. Numerical Simulation using Ansys-Fluent is carried out to two bladed and three bladed configurations, which provides a lot of insight about three dimensional unsteady flow over it. It confirms the ability of numerical approach, to evaluate and compare the efficiency of VAWT against each other.It has been observed that two blades Savonius wind turbine is more efficient, it has higher power coefficient under the same condition than that of three blades Savonius wind turbine.

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