Wake behavior and control: comparison of LES simulations and wind tunnel measurements

Abstract

Abstract. This paper applies a large-eddy actuator line approach to the simulation of\nwind turbine wakes. In addition to normal operating conditions, a specific\nfocus of the paper is on wake manipulation, which is performed here by\nderating, yaw misalignment and cyclic pitching of the blades. With the\npurpose of clarifying the ability of LES methods to represent conditions that\nare relevant for wind farm control, numerical simulations are compared to\nexperimental observations obtained in a boundary layer wind tunnel with\nscaled wind turbine models. Results indicate a good overall matching of\nsimulations with experiments. Low-turbulence test cases appear to be more\nchallenging than moderate- and high-turbulence ones due to the need for\ndenser grids to limit numerical diffusion and accurately resolve tip-shed\nvortices in the near-wake region.