| Autor: |
H. Daaou Nedjari, O. Guerri, M. Saighi |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Energy Reports, Vol 6, Iss , Pp 232-255 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2352-4847 |
| DOI: |
10.1016/j.egyr.2019.10.041 |
| Popis: |
This paper purpose a numerical study of the flow downstream a wind turbine erected in the neutral atmospheric boundary layer. A first part consists of unsteady wind flow simulations through a full moving rotor, which lets identifying the vortex generated in the wind turbine wake. The governed equations were solved in two sub-domains (Rotor/Stator) and the moved fluid flow continuity at the domain interface was managed by the Sliding Mesh technique of Turbo-machinery implemented in an open-source ‘Code _Saturne’. However, the unsteady full rotor calculations proved to be extensive and inadequate for optimizing the wind farm layout. Therefore, to achieve a more accessible wake model, the second part consists of the design of a generalized hybrid wake model in which, contrary to the full simulation, an actuator disc ‘with non-zero thicknesses’ has substituted the rotor and was coupled to the Reynolds averaged Navier Stokes equations (RANS) through additional source terms. The modified k-ε was used to model the turbulence developed downstream the rotor. The ability of the proposed model to represent the wake was demonstrated by a series of validations with experimental data and results were in good agreement. Keywords: U-RANS, Sliding Mesh, Generalized actuator volume, CFD |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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