Computational studies of the horizontal axis wind turbines in high wind speed condition using advanced turbulence models

dc.contributor.advisor Sankar, Lakshmi N.
dc.contributor.author Benjanirat, Sarun en_US
dc.contributor.committeeMember Smith, Marilyn J.
dc.contributor.committeeMember Yeung, P. K.
dc.contributor.committeeMember Shelton, Samuel
dc.contributor.committeeMember Stephen, Ruffin
dc.contributor.department Aerospace Engineering en_US
dc.date.accessioned 2007-03-27T18:06:51Z
dc.date.available 2007-03-27T18:06:51Z
dc.date.issued 2006-08-24 en_US
dc.description.abstract Next generation horizontal-axis wind turbines (HAWTs) will operate at very high wind speeds. Existing engineering approaches for modeling the flow phenomena are based on blade element theory, and cannot adequately account for 3-D separated, unsteady flow effects. Therefore, researchers around the world are beginning to model these flows using first principles-based computational fluid dynamics (CFD) approaches. In this study, an existing first principles-based Navier-Stokes approach is being enhanced to model HAWTs at high wind speeds. The enhancements include improved grid topology, implicit time-marching algorithms, and advanced turbulence models. The advanced turbulence models include the Spalart-Allmaras one-equation model, k-epsilon, k-omega and Shear Stress Transport (k-omega-SST) models. These models are also integrated with detached eddy simulation (DES) models. Results are presented for a range of wind speeds, for a configuration termed National Renewable Energy Laboratory Phase VI rotor, tested at NASA Ames Research Center. Grid sensitivity studies are also presented. Additionally, effects of existing transition models on the predictions are assessed. Data presented include power/torque production, radial distribution of normal and tangential pressure forces, root bending moments, and surface pressure fields. Good agreement was obtained between the predictions and experiments for most of the conditions, particularly with the Spalart-Allmaras-DES model. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 7595487 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/13976
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Wind energy en_US
dc.subject Turbulence model en_US
dc.subject Compuational fluid dynamics en_US
dc.title Computational studies of the horizontal axis wind turbines in high wind speed condition using advanced turbulence models en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Sankar, Lakshmi N.
local.contributor.corporatename College of Engineering
local.contributor.corporatename Daniel Guggenheim School of Aerospace Engineering
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relation.isOrgUnitOfPublication a348b767-ea7e-4789-af1f-1f1d5925fb65
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