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The contribution of large scale structures in the power generation of finite scale wind farms using large eddy simulation

Yulia T. Peet
School for Engineering of Matter, Transport and Energy Arizona State University Tempe, Arizona 85287-6106, USA

Tanmoy Chatterjee
Mechanical and Aerospace Engineering School of Matter Transport and Energy, Arizona State University 501 E. Tyler Mall, Tempe, AZ 85287

Sinopsis

The large scale organizations in the flow around the finite scale wind farms that contribute to the turbine power, have been studied in the current paper. The study has been carried out using Large Eddy Simulation (LES) with near wall modelling, and the turbine forces are modelled using the actuator line model. Proper orthogonal decomposition (POD) has been used as a tool of analysis to understand the large scale features contributing to the power generation by wind turbines in different rows of a wind farm. The POD modes reveal the existence of energetic flow features significantly larger than the turbine rotor diameter contributing to the flux of the mean kinetic energy (MKE). Thes fluxes play an instrumental role in power generation as also observed in the previous literature. New insights on the flow structures around the wind farm have been obtained which opens up further research directions to understand the localized transfer of the MKE flux.