Modeling and Validation of a Cross Flow Turbine using Free Vortex Models and an improved 2D Lift Model

Conference Paper

Title: Modeling and Validation of a Cross Flow Turbine using Free Vortex Models and an improved 2D Lift Model
Publication Date:
September 20, 2010
Conference Name: OCEANS 2010
Conference Location: Seattle, WA
Pages: 8
Technology Type:

Document Access

Attachment: Access File
(2 MB)

Citation

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.
Abstract: 

A number of numerical methods have been developed to predict the performance and aerodynamic loads of the Darrieus turbine. Prior work by Reference [1] using blade element methods (BEM) and free vortex methods (FVM) [2] 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 [2] [3] and [4] 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.

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