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. Thesis (Doctoral), E.T.S.I. Industriales (UPM).

Description

Title: Development of a wake model for wind farms based on an open source CFD solver. Strategies on parabolization and turbulence modeling
Author/s:
  • Cabezón Martínez, Daniel
Contributor/s:
  • Crespo Martínez, Antonio
  • Migoya Valor, Emilio
Item Type: Thesis (Doctoral)
Date: 2013
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética y Fluidomecánica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 21761
DC Identifier: http://oa.upm.es/21761/
OAI Identifier: oai:oa.upm.es:21761
Deposited by: Archivo Digital UPM
Deposited on: 25 Nov 2013 09:21
Last Modified: 26 Sep 2014 22:56
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