Prediction of wind-turbine fatigue loads in forest regions based on turbulent LES inflow fields
Journal article, 2017
Large-eddy simulations (LES) were used to predict the neutral atmospheric boundary layer over a sparse and a dense forest, as well as over grass-covered flat terrain. The forest is explicitly represented in the simulations through momentum sink terms. Turbulence data extracted from the LES served then as inflow turbulence for the simulation of the dynamic structural response of a generic wind turbine. In this way, the impact of forest density, wind speed and wind-turbine hub height on the wind-turbine fatigue loads was studied. Results show for example significantly increased equivalent fatigue loads above the two forests. Moreover, a comparison between LES turbulence and synthetically generated turbulence in terms of load predictions was made and revealed that synthetic turbulence was able to excite the same spectral peaks as LES turbulence but lead to consistently lower equivalent fatigue loads. Copyright (c) 2016 John Wiley & Sons, Ltd.
canopy flow
Energy & Fuels
Engineering
parameters
journal of the atmospheric sciences
ardorff jw
model
atmospheric boundary-layer
tensor
wind turbine
resolution
forest canopy
atmospheric turbulence
v29
statistics
p91
1972
fatigue loads
large-eddy simulation
large-eddy simulation
complex terrain
foliar density
Author
Bastian Nebenführ
Chalmers, Applied Mechanics, Fluid Dynamics
Swedish Wind Power Technology Centre (SWPTC)
Lars Davidson
Chalmers, Applied Mechanics
Swedish Wind Power Technology Centre (SWPTC)
Chalmers, Applied Mechanics, Fluid Dynamics
Wind Energy
1095-4244 (ISSN) 1099-1824 (eISSN)
Vol. 20 6 1003-1015Driving Forces
Sustainable development
Areas of Advance
Building Futures (2010-2018)
Energy
Subject Categories (SSIF 2011)
Energy Engineering
Environmental Engineering
Other Environmental Engineering
DOI
10.1002/we.2076