Study of flow characteristics of a savonius turbine inside nozzle diffuser duct
Understanding of characteristics of a savonius turbine in hydro environment with and without duct
In the present study, flow characteristics of savonius hydrokinetic turbines are analysed numerically. The CFD simulations are done for the savonius turbine with and without duct. A special design of nozzle-diffuser duct in the present simulation exhibits a higher performance of the turbine. The simulations are done at different TSR (Tip Speed Ratio) for which the Torque coefficient (CT) and Power coefficient (CP) are compared for both the cases at constant Re (2.0 x 106). A significant increase of 64.65% in Power coefficient (CP) is noticed for a ducted turbine when compared to a non-ducted turbine and also interesting vortices were formed inside a duct.