Analysis of Turbine Wake Characteristics using Dynamic Mode Decomposition

摘要

We examine the flow characteristics behind a three-bladed horizontal-axis wind turbine via experiments in a large-scale wind tunnel with a scaled model placed in a typical Atmospheric Boundary Layer (ABL) wind under neutral stability conditions. A high-resolution digital particle image velocimetry (PIV) system was used to study the detailed flow field. Besides analyzing average statistics of the flow quantities such as mean velocity and vorticity distributions in the wake, "phase-locked" PIV measurements also elucidated further details of the vortex structures in the wake for a frozen position of the blades. Phase-averaged measurements of the near-wake (0