Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines
Modelling of turbine blade-induced turbulence (BIT) is discussed within the framework of three-dimensional Reynolds-averaged Navier-Stokes (RANS) actuator disk computations. We first propose a generic (baseline) BIT model, which is applied only to the actuator disk surface, does not include any mode...
| Auteurs principaux: | , |
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| Format: | Journal article |
| Langue: | English |
| Publié: |
Springer Berlin Heidelberg
2014
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| Sujets: |
| _version_ | 1826292644766023680 |
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| author | Nishino, T Willden, R |
| author_facet | Nishino, T Willden, R |
| author_sort | Nishino, T |
| collection | OXFORD |
| description | Modelling of turbine blade-induced turbulence (BIT) is discussed within the framework of three-dimensional Reynolds-averaged Navier-Stokes (RANS) actuator disk computations. We first propose a generic (baseline) BIT model, which is applied only to the actuator disk surface, does not include any model coefficients (other than those used in the original RANS turbulence model) and is expected to be valid in the limiting case where BIT is fully isotropic and in energy equilibrium. The baseline model is then combined with correction functions applied to the region behind the disk to account for the effect of rotor tip vortices causing a mismatch of Reynolds shear stress between short- and long-time averaged flow fields. Results are compared with wake measurements of a two-bladed wind turbine model of Medici and Alfredsson [Wind Energy, Vol. 9, 2006, pp. 219-236] to demonstrate the capability of the new model. |
| first_indexed | 2024-03-07T03:17:53Z |
| format | Journal article |
| id | oxford-uuid:b66ae8c8-4f5d-4726-8eca-45157ec111bf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:17:53Z |
| publishDate | 2014 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | oxford-uuid:b66ae8c8-4f5d-4726-8eca-45157ec111bf2022-03-27T04:40:47ZLow-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbinesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b66ae8c8-4f5d-4726-8eca-45157ec111bfTechnology and Applied SciencesEnglishOxford University Research Archive - ValetSpringer Berlin Heidelberg2014Nishino, TWillden, RModelling of turbine blade-induced turbulence (BIT) is discussed within the framework of three-dimensional Reynolds-averaged Navier-Stokes (RANS) actuator disk computations. We first propose a generic (baseline) BIT model, which is applied only to the actuator disk surface, does not include any model coefficients (other than those used in the original RANS turbulence model) and is expected to be valid in the limiting case where BIT is fully isotropic and in energy equilibrium. The baseline model is then combined with correction functions applied to the region behind the disk to account for the effect of rotor tip vortices causing a mismatch of Reynolds shear stress between short- and long-time averaged flow fields. Results are compared with wake measurements of a two-bladed wind turbine model of Medici and Alfredsson [Wind Energy, Vol. 9, 2006, pp. 219-236] to demonstrate the capability of the new model. |
| spellingShingle | Technology and Applied Sciences Nishino, T Willden, R Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title | Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title_full | Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title_fullStr | Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title_full_unstemmed | Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title_short | Low-order modelling of blade-induced turbulence for RANS actuator disk computations of wind and tidal turbines |
| title_sort | low order modelling of blade induced turbulence for rans actuator disk computations of wind and tidal turbines |
| topic | Technology and Applied Sciences |
| work_keys_str_mv | AT nishinot lowordermodellingofbladeinducedturbulenceforransactuatordiskcomputationsofwindandtidalturbines AT willdenr lowordermodellingofbladeinducedturbulenceforransactuatordiskcomputationsofwindandtidalturbines |