Results 211 to 220 of about 6,676 (235)
Some of the next articles are maybe not open access.
Wind turbine wake aerodynamics
Progress in Aerospace Sciences, 2003Abstract The aerodynamics of horizontal axis wind turbine wakes is studied. The contents is directed towards the physics of power extraction by wind turbines and reviews both the near and the far wake region. For the near wake, the survey is restricted to uniform, steady and parallel flow conditions, thereby excluding wind shear, wind speed and rotor
L.J. Vermeer, J.N. Sørensen, A. Crespo
openaire +1 more source
Wind Tunnel Investigation on Wake Effects of a Wind Turbine
2009The flow field in the wake of a an horizontal axis wind turbine was studied through wind tunnel tests at the Mechanical Department of the Politecnico di Milano. Aim of the research is to measure the wind flow in different points in the wake in order to characterize the flow blowing on structures that are positioned downwind a wind turbine and ...
DIANA, GIORGIO +2 more
openaire +2 more sources
Met Mast Measurements of Wind Turbine Wakes
2021This chapter addresses met mast measurements for wind turbine wake research, where we tackle the matter by posing and answering three questions. By asking ourselves what the value is of met mast measurements for wake/aerodynamic research, we describe how met masts can be and have been used in aerodynamic research, accompanied by a number of ...
openaire +2 more sources
Turbulent Wind Turbine Wakes in a Wind Farm
2012A model of flow in a cluster of wind turbines has been developed. The model predicts average and standard deviation of wind speed in a wind farm as function of ambient wind speed, wind direction and turbulence intensity. In this paper the sub-models for velocity deficit and added turbulence of a single wind turbine are presented.
Arno J. Brand, Jan Willem Wagenaar
openaire +1 more source
Anisotropy of turbulence in wind turbine wakes
Journal of Wind Engineering and Industrial Aerodynamics, 2005This work is mainly dedicated to the study of non-isotropic characteristics of turbulence in wind turbine wakes, specifically the shear layer of the near wake. A calculation method based on an explicit algebraic model for the components of the turbulent stress tensor is proposed, and the results are found to be in acceptable agreement with experimental
Rafael Gómez-Elvira +4 more
openaire +1 more source
Journal of Fluid Mechanics, 2018
Understanding and predicting the behaviour of wind turbine wake flows over hills is important for optimal design of wind-farm configurations on topography. In this study, we present an analytical modelling framework together with large-eddy simulation (LES) results to investigate turbine wakes over two-dimensional hills.
Sina Shamsoddin, Fernando Porté-Agel
openaire +1 more source
Understanding and predicting the behaviour of wind turbine wake flows over hills is important for optimal design of wind-farm configurations on topography. In this study, we present an analytical modelling framework together with large-eddy simulation (LES) results to investigate turbine wakes over two-dimensional hills.
Sina Shamsoddin, Fernando Porté-Agel
openaire +1 more source
Numerical Modeling of Wind Turbine Wakes
Journal of Fluids Engineering, 2002An aerodynamical model for studying three-dimensional flow fields about wind turbine rotors is presented. The developed algorithm combines a three-dimensional Navier-Stokes solver with a so-called actuator line technique in which the loading is distributed along lines representing the blade forces.
Jens No̸rkær So̸rensen +1 more
openaire +1 more source
Turbulence characteristics in wind-turbine wakes
Journal of Wind Engineering and Industrial Aerodynamics, 1996Abstract An analysis of the evolution of turbulence characteristics in wind-turbine wakes has been carried out. Based on experimental results and on numerical results obtained with a CFD code, complemented with some theoretical considerations, simple analytical expressions are proposed for the estimation of the turbulent kinetic energy, k, and its ...
A. Crespo, J. Herna´ndez
openaire +1 more source
Aeroelastic Analysis of a Wind Turbine Operating in the Wakes of an Upstream Wind Turbine
Proceedings of Global Power & Propulsion SocietyThis study investigates the impact of an upstream turbine wake on the aeroelastic characteristics of a downstream wind turbine. The wake profiles at distances of 3D, 5D and 7D, where D is the rotor diameter, are extracted from a single turbine simulation with a uniform inflow and applied as the inlet conditions in consequent downstream turbine ...
Shine Win Naung +5 more
openaire +1 more source
Near-wake behaviour of wind turbines
Journal of Wind Engineering and Industrial Aerodynamics, 1999If wind turbines are to be large contributors to energy production, a large amount of turbines have to be erected. As the areas suitable for wind energy production are limited, an optimum use of these areas are needed.
openaire +1 more source