A number of numerical methods have been developed to predict the performance and aerodynamic loads of the Darrieus turbine. Prior work by Reference  using blade element methods (BEM) and free vortex methods (FVM)  has produced reasonable models that predict the hydrodynamic performance of the Darrieus turbine. The validated models reasonably estimate the performance at low solidities (Nc/R<0), but lose accuracy at higher solidity ratios. Dynamic stall and flow curvature has been recognized by   and  to be significant modeling parameters which have limited the accuracy of prior models. The current numerical model extends the predictions of the FVM model to a higher solidity ratio range. An improved model is presented for the condition of high angles of attack and for dynamic stall,. Experimental data on a series of two (Nc/R≈.9) and four (Nc/R≈1.8) blade configurations are presented as validation of the modified analytical vortex model.
Modeling and Validation of a Cross Flow Turbine using Free Vortex Models and an improved 2D Lift Model
Title: Modeling and Validation of a Cross Flow Turbine using Free Vortex Models and an improved 2D Lift Model
September 20, 2010
Conference Name: OCEANS 2010
Conference Location: Seattle, WA
Notice: This material may be protected by Copyright Law.
Urbina, R.; Peterson, M.; Bates, P.; Kimball, R. (2010). Modeling and Validation of a Cross Flow Turbine using Free Vortex Models and an improved 2D Lift Model. Paper Presented at the OCEANS 2010, Seattle, WA.