Wind turbine wake analysis and modelling

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High fidelity Computational Fluid Dynamics (CFD) will be used to simulate flows past individual and small clusters of wind turbines to develop detailed models of wind turbine wakes and their merger and interactions. The performance and wakes of generic large turbines will be considered. The influence of vertical flow shearing, cross-stream variation in speed and turbulence intensity, and relative device placement that lead to inviscid (blockage) and viscous interactional effects will be considered. CFD simulations will be performed with blade resolved RANS models and Actuator Line LES models in order to capture relevant wake physics. Simplified representation and reconstruction of turbine wakes is of critical importance to developing understanding of the physical processes governing wake evolution. Flow-field decon-struction methods such as POD (Proper Orthogonal Decomposition) will be used to identify the leading order wake modes and physical processes important in wake development, merger and representation, which will be used to devel-op new wake merger and evolution models and algorithms.