Simulation of wind farms in flat and complex terrain using CFD

Prospathopoulos, John; Cabezón Martínez, Daniel; Politis, Evangelos S.; Chaviaropoulos, P. K.; Rados, K.; Schepers, J.G.; Hansen, Kurt S. y Barthelmie, Rebecca J. (2010). Simulation of wind farms in flat and complex terrain using CFD. En: "The Science of making Torque from Wind (Torque 2010)", 28/06/2010 - 30/06/2010, Crete, Greece. pp..

Descripción

Título: Simulation of wind farms in flat and complex terrain using CFD
Autor/es:
  • Prospathopoulos, John
  • Cabezón Martínez, Daniel
  • Politis, Evangelos S.
  • Chaviaropoulos, P. K.
  • Rados, K.
  • Schepers, J.G.
  • Hansen, Kurt S.
  • Barthelmie, Rebecca J.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: The Science of making Torque from Wind (Torque 2010)
Fechas del Evento: 28/06/2010 - 30/06/2010
Lugar del Evento: Crete, Greece
Título del Libro: The Science of making Torque from Wind (Torque 2010)
Fecha: 2010
Materias:
Palabras Clave Informales: Wind turbine wakes, CFD modelling, complex terrain, induction factor, turbulence model correction
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Use of computational fluid dynamic (CFD) methods to predict the power production from wind entire wind farms in flat and complex terrain is presented in this paper. Two full 3D Navier–Stokes solvers for incompressible flow are employed that incorporate the k–ε and k–ω turbulence models respectively. The wind turbines (W/Ts) are modelled as momentum absorbers by means of their thrust coefficient using the actuator disk approach. The WT thrust is estimated using the wind speed one diameter upstream of the rotor at hub height. An alternative method that employs an induction-factor based concept is also tested. This method features the advantage of not utilizing the wind speed at a specific distance from the rotor disk, which is a doubtful approximation when a W/T is located in the wake of another and/or the terrain is complex. To account for the underestimation of the near wake deficit, a correction is introduced to the turbulence model. The turbulence time scale is bounded using the general “realizability” constraint for the turbulent velocities. Application is made on two wind farms, a five-machine one located in flat terrain and another 43-machine one located in complex terrain. In the flat terrain case, the combination of the induction factor method along with the turbulence correction provides satisfactory results. In the complex terrain case, there are some significant discrepancies with the measurements, which are discussed. In this case, the induction factor method does not provide satisfactory results.

Más información

ID de Registro: 21050
Identificador DC: http://oa.upm.es/21050/
Identificador OAI: oai:oa.upm.es:21050
Depositado por: Memoria Investigacion
Depositado el: 15 Mar 2014 08:48
Ultima Modificación: 21 Abr 2016 11:09
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