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Title: Validation of blade-resolved computational fluid dynamics for a MW-scale turbine rotor in atmospheric flow

Journal Article · · Journal of Physics. Conference Series
 [1];  [2];  [2];  [1];  [1];  [2]
  1. Technical Univ. of Denmark, Roskilde (Denmark)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
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In this study, simulation results of two different computational fluid dynamics codes, Nalu-Wind and EllipSys3D, are presented for a wind turbine rotor in complex yawed and sheared inflow. The results are compared to measurements from the DanAero experiments, to validate computed pressures and azimuthal trends. Despite different code methodologies and grid setups, the codes agree well in computed pressures and integrated forces along the blade for all blade azimuthal positions, however with some discrepancy in the very yawed case. Additionally, both codes capture well the azimuthal trends and force levels seen in measurements. Investigation into discrepancies shows that expanding grids before the rotor, lead to smearing of the wind profiles, which is likely the main cause of the differences in the results between the codes. Additionally, omission of the ground constraint cause discrepancies in relative velocity seen by the passing blade, due to an over speeding beneath the rotor.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4W); Danish Energy Authorities
Grant/Contract Number:
AC36-08GO28308; EFP2007
OSTI ID:
1668864
Report Number(s):
NREL/JA-5000-77985; MainId:31894; UUID:bf5b83da-13f1-4d2a-a2fe-ed6d646fa4ba; MainAdminID:18630
Journal Information:
Journal of Physics. Conference Series, Vol. 1618, Issue 5; ISSN 1742-6588
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (5)

Comparison of wind turbine wake properties in non-sheared inflow predicted by different computational fluid dynamics rotor models: Comparison of wake properties predicted by different rotor models journal April 2014
Comparison of the Blade Element Momentum Theory with Computational Fluid Dynamics for Wind Turbine Simulations in Turbulent Inflow journal December 2018
An Improved Simplec Method on Collocated Grids for Steady and Unsteady flow Computations journal March 2003
Wind turbine rotor-tower interaction using an incompressible overset grid method journal September 2009
A simple atmospheric boundary layer model applied to large eddy simulations of wind turbine wakes: A simple ABL model applied to LES of wind turbine wakes journal April 2013

Figures / Tables (12)

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Table 1(p. 9)table Table 1

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17 WIND ENERGY
blade resolved
CFD
Nalu-wind
RANS
validation
wind turbines