Coordinateurs du projet
Context
In order to best account for the atmospheric conditions in which wind turbines operate, simulations must use input data from wind fields that not only have the correct intensity and shear, but also the correct level of turbulence and spatio-temporal structure. In configurations where the wind turbine under study is located downstream of another, the turbulent structures in the wake have a significant impact on the wind turbine’s operation. Accurately accounting for these structures in simulation and prediction tools is therefore a major challenge, which is the focus of the WIND2SIM research project.
Scientific breakthroughs and innovation
Objective of the WIND2SIM project
The objective of the WIND2SIM project is to improve the quality and representativeness of aerodynamic and aeroelastic simulations of offshore wind turbines operating in the wake of other wind turbines by developing an original method for generating turbulent wind fields representative of the wake of a wind turbine, enabling provide realistic input data for aeroelastic calculation codes such as the FAST code (NREL, USA).
Project strategy
The strategy proposed in the WIND2SIM project aims to couple velocity measurements taken in a straight section of the wake of a wind turbine model in an atmospheric wind tunnel with an aeroelastic calculation code. In addition to taking measurements, this will require modeling the temporal dynamics of the flow and transposing the wind tunnel data to the actual scale of the numerical simulation.
Expertise within the project
Le projet s’appuiera sur l’expertise de l’équipe DAUC/LHEEA (Centrale Nantes – CNRS) en matière d’essais et métrologie en soufflerie ainsi qu’en modélisation des écoulements atmosphériques. La couche limite atmosphérique offshore développée dans la soufflerie atmosphérique de l’équipe DAUC/LHEEA dans le cadre du projet FLOATEOLE constituera l’écoulement de base. En effet, elle possède, à l’échelle du 1/500, toute les caractéristiques statistiques de l’atmosphère offshore. Le dispositif de test d’une éolienne offshore développé dans FLOATEOLE servira de base pour générer des conditions perturbées par une éolienne amont fixe ou flottante alimentant le code de calcul aéroélastique (FAST). Ce développement pourra être utilisé directement dans le projet SOFTWIND pour étudier le comportement du flotteur d’une éolienne dans des conditions réalistes dans un sillage.
Expected technical and economic impact
By being completely driven by real flow data, this approach breaks free from conventional methods and the need for a wake model, and will offer an excellent degree of representativeness of the upstream flow to the machine.
Furthermore, by varying the degree of representativeness of the input conditions obtained, the aeroelastic simulations performed will make it possible to analyze the major factors responsible for machine fatigue (local or global) and performance degradation, and ultimately to develop and test wind turbine control strategies.
Publications and presentations produced
POD analysis of the wake dynamics of an offshore floating wind turbine model, 2022. C. Raibaudo, T. Piquet, B. Schliffke, B. Conan, L. Perret, Journal of Physics Conference Series 2265(2):022085
Experimental Analysis of the Wake Meandering of a Floating Wind Turbine under Imposed Surge Motion, 2022. L. Pardo Garcia, B. Conan, S. Aubrun, L. Perret, T. Piquet, C. Raibaudo, B. Schliffke, Journal of Physics Conference Series 2265(4):042003
Industrial benefits
Validated and operational methodology for interfacing experiments and calculations
Contribution of realistic input data quantified in relation to existing methods