Abstract
Abstract The current strong global consensus on reducing carbon emissions is a motivation to develop more efficient means of harnessing sustainable sources of energy. Accordingly, research efforts toward the development of more efficient wind turbine designs are desirable. With this motivation, we present a set of numerical studies on flows past vertical axis wind turbines (VAWTs). We perform large eddy simulations (LES) of flows past several VAWT configurations. A uniform inflow is set for our simulations. The influence of turbine blades on the flow field is modeled using the actuator line method (ALM). Our focus is on a twin rotor configuration, wherein the rotors are placed close enough, so that the separation between the centers of the two rotors is less than the diameter of the two individual turbines (the overlapping configuration). We demonstrate that such a configuration indeed results in (a) the enhanced power coefficient (ratio of power extracted by the turbine configuration to the power available in the freestream) and (b) better power density (power extracted by a turbine configuration per unit ground area occupied by the VAWT) compared to a single rotor VAWT configuration. Based on our findings, we conclude that the overlapping twin rotor arrangement can prove to be the preferred configuration for large-scale VAWT-based wind farms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
