Abstract
This work focuses on the dynamic analysis of a modelled wind turbine wake during yaw manoeuvres. Indeed, in the context of wind farm control, misalignment of wind turbines is envisaged as a solution to reduce wind turbine wake interactions, by skewing the wake trajectory. To optimize the control strategies, the aerodynamic response of the wake to this type of yaw manoeuvres, as well as the global load response of the rotor disc of the downstream wind turbine, must be quantified. As a first approach, the identification of the overall system is performed through wind tunnel experiments, using a rotor model based on the actuator disc concept. A misalignment scenario of the upstream wind turbine model is imposed and the wind turbine wake deflection is dynamically captured and measured by the use of Particle Imaging Velocimetry.
Highlights
Introduction and work objectivesThis work focuses on the analysis of dynamic wind turbine misalignment
An experimental set-up in wind tunnel has been designed to study the aerodynamic response of a modelled wind turbine wake when subjected to misalignment/realignment scenarii
The flow impacting the downstream wind turbine consequent to a static yaw variation was investigated in three flow conditions excluding the Reynolds dependence of the results
Summary
This work focuses on the analysis of dynamic wind turbine misalignment This condition is considered as undesired (lack of the control system or fast variation of the wind direction) but voluntary misalignment could be used to improve the overall wind farm power yield. The appropriate misalignment of a wind turbine can improve the rate of production and the lifetime of the downstream one Applying this solution though needs a better comprehension of the consequences of this kind of maneuvers in terms of wake interactions. The present paper illustrates an experimental modelling of the misalignment process This operation was reproduced in a wind tunnel under static and dynamic variations of the yaw angle and its effects in term of wake deviation at a fixed downstream distance were investigated. The static wake deviation due to a static yaw angle is studied for different wind speeds, and the dynamic wake deviation is analyzed during yaw maneuvers
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