Development of a wake model for wind farms based on an open source CFD solver. Strategies on parabolization and turbulence modeling

Cabezón Martínez, Daniel (2013). Development of a wake model for wind farms based on an open source CFD solver. Strategies on parabolization and turbulence modeling. Tesis (Doctoral), E.T.S.I. Industriales (UPM).

Descripción

Título: Development of a wake model for wind farms based on an open source CFD solver. Strategies on parabolization and turbulence modeling
Autor/es:
  • Cabezón Martínez, Daniel
Director/es:
  • Crespo Martínez, Antonio
  • Migoya Valor, Emilio
Tipo de Documento: Tesis (Doctoral)
Fecha: 2013
Materias:
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Energética y Fluidomecánica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Wake effect represents one of the most important aspects to be analyzed at the engineering phase of every wind farm since it supposes an important power deficit and an increase of turbulence levels with the consequent decrease of the lifetime. It depends on the wind farm design, wind turbine type and the atmospheric conditions prevailing at the site. Traditionally industry has used analytical models, quick and robust, which allow carry out at the preliminary stages wind farm engineering in a flexible way. However, new models based on Computational Fluid Dynamics (CFD) are needed. These models must increase the accuracy of the output variables avoiding at the same time an increase in the computational time. Among them, the elliptic models based on the actuator disk technique have reached an extended use during the last years. These models present three important problems in case of being used by default for the solution of large wind farms: the estimation of the reference wind speed upstream of each rotor disk, turbulence modeling and computational time. In order to minimize the consequence of these problems, this PhD Thesis proposes solutions implemented under the open source CFD solver OpenFOAM and adapted for each type of site: a correction on the reference wind speed for the general elliptic models, the semi-parabollic model for large offshore wind farms and the hybrid model for wind farms in complex terrain. All the models are validated in terms of power ratios by means of experimental data derived from real operating wind farms.

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ID de Registro: 21761
Identificador DC: http://oa.upm.es/21761/
Identificador OAI: oai:oa.upm.es:21761
Depositado por: Archivo Digital UPM
Depositado el: 25 Nov 2013 09:21
Ultima Modificación: 26 Sep 2014 22:56
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