Computational analysis of high-lift-generating airfoils for diffuser-augmented wind turbines

Rotor Design for Diffuser Augmented Wind Turbines

Diffuser augmented wind turbines (DAWTs) can increase mass flow through the rotor substantially, but have often failed to fulfill expectations. We address high-performance diffusers, and investigate the design requirements for a DAWT rotor to efficiently convert the available energy to shaft energy. Several factors can induce wake stall scenarios causing significant energy loss. The causality b...

Aerodynamic Analysis of Wind Turbines Rotors with High Lift Airfoils by Using Pre-conditioned WENO Scheme

The aerodynamic analysis of wind turbine rotors using preconditioned weighted essentially non-oscillatory scheme to solve the compressible NavierStokes equations in non-inertial coordinate system with Spalart-Allmaras one equation turbulence model is presented. A parallel clustering algorithm based on Message Passing Interface library was implemented. The NREL Phase VI rotor with S809 airfoil w...

Development of Thick Airfoils for Wind Turbines

New Airfoils for Small Horizontal Axis Wind Turbines

Department of Aeronautical and Astronautical Engineering. University of Illinois at Urbana-Champaign. 306 Talbot Laboratory. 104 S. Wright Street. Urbana. IL 61801-2935 In a continuing effort to enhance the performance of small wind energy systems, one root airfoil and three primary airfoils were specifically designed for small horizontal axis wind turbines. These airfoils are intended primaril...

A Multi-Element Diffuser Augmented Wind Turbine

A new class of diffuser augmented wind turbines (DAWTs) is presented. The new diffuser concept exploits aero-dynamic principles for the creation of high-lift airfoil configurations known from the aircraft industry. Combining this with our objective of obtaining a compact power-efficient design has enabled creation of a family of DAWT designs with energy capture potentials which exceed the power...