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Abstract
A novel validation methodology allows verifying a CFD model over the entire wind turbine induction zone using measurements from three synchronized lidars. The validation procedure relies on spatially discretizing the probability density function of the measured freestream wind speed. The resulting distributions are reproduced numerically by weighting steadystate Reynolds averaged NavierStokes simulations accordingly. The only input varying between these computations is the velocity at the inlet boundary. The rotor is modelled using an actuator disc. So as to compare lidar and simulations, the spatial and temporal uncertainty of the measurements is quantified and propagated through the data processing. For all velocity components the maximal difference between measurements and model are below 4.5% relative to the average wind speed for most of the validation space. This applies to both mean and standard deviation. One rotor radius upstream the difference reaches maximally 1.3% for the axial component.
Original language  English 

Journal  Wind Energy 
Volume  20 
Pages (fromto)  14811498 
Number of pages  18 
ISSN  10954244 
DOIs  
Publication status  Published  2017 
Keywords
 Renewable Energy, Sustainability and the Environment
 Blockage effect
 CFD
 Induction zone
 Lidar
 Uncertainty quantification
 Upstream flow
 Validation
 Actuator disks
 Computational fluid dynamics
 Data handling
 Navier Stokes equations
 Optical radar
 Uncertainty analysis
 Wind
 Wind turbines
 Blockage effects
 Mean and standard deviations
 Measurements and modeling
 Reynoldsaveraged navierstokes simulations
 Uncertainty quantifications
 Validation methodologies
 Probability density function
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Projects
 1 Finished

UniTTe: Unified testing procedures for wind turbines through inflow characterisation using nacelle lidars
Wagner, R., Pedersen, T. F., Troldborg, N., Meyer Forsting, A., Bechmann, A., Courtney, M., Borraccino, A., Vignaroli, A., Natarajan, A., Sathe, A. & Dimitrov, N. K.
01/01/2014 → 31/12/2017
Project: Research
Activities

A Probabilistic Approach to CFD Validation with Field Measurements in Wind Energy
Alexander Raul Meyer Forsting (Speaker)
15 Jun 2017Activity: Talks and presentations › Conference presentations
File 
A Probabilistic Approach to CFD Model Validation with Field Measurements in Wind Energy
Alexander Raul Meyer Forsting (Speaker)
20 Jun 2017Activity: Talks and presentations › Talks and presentations in private or public companies and organisations
File