TY - JOUR
T1 - A Simple Model for the Turbulence Intensity Distribution in Atmospheric Boundary Layers
AU - Cheung, L. C.
AU - Premasuthan, S.
AU - Davoust, S.
AU - Von Terzi, D.
PY - 2016
Y1 - 2016
N2 - In the current work, we examine the distribution of turbulence intensity (TI) in simulations of atmospheric boundary layers (ABL) for wind turbine applications. We relate the turbulent fluctuations to the mean wind shear profile for neutrally stable ABL based on turbulent boundary layer theory. The results are then compared to corresponding LES data for various shear conditions. From this, a model for the TI distribution across a rotor disc is devised and calibrated. In addition, a second simpler version of the model is derived by assuming a power law for the velocity profile. The models are related to the Mann model and shown to have a similar scaling, however they are simpler and based on assumptions for turbulent boundary layers rather than homogeneous turbulence. The models are then tested for a range of stability conditions and shear values of the ABL including waked conditions from upstream wind turbines that stretch the assumptions made.
AB - In the current work, we examine the distribution of turbulence intensity (TI) in simulations of atmospheric boundary layers (ABL) for wind turbine applications. We relate the turbulent fluctuations to the mean wind shear profile for neutrally stable ABL based on turbulent boundary layer theory. The results are then compared to corresponding LES data for various shear conditions. From this, a model for the TI distribution across a rotor disc is devised and calibrated. In addition, a second simpler version of the model is derived by assuming a power law for the velocity profile. The models are related to the Mann model and shown to have a similar scaling, however they are simpler and based on assumptions for turbulent boundary layers rather than homogeneous turbulence. The models are then tested for a range of stability conditions and shear values of the ABL including waked conditions from upstream wind turbines that stretch the assumptions made.
UR - http://www.scopus.com/inward/record.url?scp=84995519541&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/753/3/032008
DO - 10.1088/1742-6596/753/3/032008
M3 - Conference article
AN - SCOPUS:84995519541
SN - 1742-6588
VL - 753
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 3
M1 - 032008
T2 - Science of Making Torque from Wind, TORQUE 2016
Y2 - 5 October 2016 through 7 October 2016
ER -