CFD Driven Design Doubled Initial Power Performance
V-Squared wind is a company working to design ducted turbine to be deployed in arrays. The duct accelerates the wind at the throat of the diffuser where the rotor blades are placed, therefore the rotor sees an accelerated flow from what it would in the freestream. By deploying these turbines in arrays the total machine power can be increased.
Doyle CFD has worked with V-Squared wind since the fall of 2013 to design a wind turbine and diffuser shape to optimize the design for aerodynamic power for deployment on Army forward operating bases. We have used RANS CFD to analyze the complete flow inside the diffuser, around the rotor blades, and the flow outside of the diffuser. This project has illustrated how useful RANS can be to depict the flow fields around the diffuser, as one of the critical elements was designing a rotor-diffuser pair that reduced blockage caused by the rotor being inside of the diffuser. In collaboration, we have doubled the coefficient of power from the original design. Once designs were settled upon, two phases of prototyping were performed to validate the RANS CFD results. The project is now entering a SBIR Phase 2 Enhancement.
Using RANS CFD we have captured turbulent effects in and around the diffuser as well as the flow around the rotor blades. By analyzing the full flow field we have been able to radically improve the design.
We are continuing work with V-Squared wind to improve the system both for commercial and Army use. This project exemplifies how RANS CFD can be used to replace or pair with prototyping to create the best product possible for great value to the customer.