Undergraduate Research & Mentoring Program

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Boundary layer, Wakes (Aerodynamics), Wind turbines -- Aerodynamics


Flow perturbation induced by interaction with a turbine rotor produces considerable turbulence which can alter the productivity of subsequent units within a wind farm. Previous methods have characterized near wake vorticity of a single turbine as well as recovery distance for various turbine array configurations. This study aims to build from previous methods of analysis from the perspective of the rotor well within a turbine array and develop a model to examine points of significant imposition in relation to rotational effects. Hot wire anemometry was employed downstream of a turbine located in the middle of the third row in a 3x3 array with data points selected in a plane parallel to the turbine rotor. Data was collected in two separate periods capturing simultaneous streamwise and wall normal velocity components and simultaneous streamwise and transverse velocity components. Contour plots of the data were constructed and analyzed in relation to rotor position. The proposed modeling method was successful in that Reynolds stresses induced by the rotor in the near wake region aligned with rotor position were visible and well-defined in expected locations. Furthermore, examination of stresses in terms of streamwise and transverse velocity components clearly depicted rotational effects induced by the rotor.

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