POD Analysis of a Wind Turbine Wake in a Turbulent Atmospheric Boundary Layer

The Science of Making Torque from Wind 2014

Bastine, D.^1 ; Witha, B.^1 ; Wächter, M.^1 ; Peinke, J.^1

ForWind, University of Oldenburg, Ammerlander Herrstr. 136, 26111 Oldenburg, Germany^1

关键词: Average velocity;    Far wakes;    Inflow conditions;    POD analysis;    Proper orthogonal decompositions;    Turbulent kinetic energy;    Wake flows;    Wind turbine wakes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012153/pdf
DOI  :  10.1088/1742-6596/524/1/012153

来源: IOP

【 摘 要 】

The wake of a single wind turbine is modeled using an actuator disk model and large eddy simulations. As inflow condition a numerically generated turbulent atmospheric boundary layer is used. The proper orthogonal decomposition (POD) is applied to a plane perpendicular to the main flow in the far wake of the turbine. Reconstructions of the field are investigated depending on the numbers of POD modes used. Even though a great number of modes is needed to recover a great part of the turbulent kinetic energy, our results indicate that relevant aspects of a wake flow can be recovered using only a few modes. Particularly, the dynamics of the average velocity over a potential disk in the wake can partially be captured using only three modes.