A new coupling of a GPU‐resident large‐eddy simulation code with a multiphysics wind turbine simulation tool

• Published in: Wind energy (Chichester, England) Vol. 27; no. 11; pp. 1152 - 1172
• Main Authors: Taschner, Emanuel, Folkersma, Mikko, A Martínez‐Tossas, Luis, Verzijlbergh, Remco, Wingerden, Jan‐Willem
• Format: Journal Article
• Language: English
• Published: Bognor Regis John Wiley & Sons, Inc 01.11.2024; Wiley
• Subjects: actuator line model; Actuators; Boundary conditions; Coupling; filtered actuator line model; Large eddy simulation; LES simulation; Simulation; Turbines; Vortices; Weather; Wind farms; Wind power; Wind turbines
• ISSN: 1095-4244; 1099-1824
• DOI: 10.1002/we.2844

The development of new wind farm control strategies can benefit from combined analysis of flow dynamics in the farm and the behavior of individual turbines within one simulation environment. In this work, we present such an environment by developing a new coupling between the large‐eddy simulation (LES) code GRASP and the multiphysics wind turbine simulation tool OpenFAST via an actuator line model (ALM). In addition, the implementation of the recently proposed filtered actuator line model (FALM) within the coupling is described. The new ALM implementation is cross‐verified with results from four other commonly used research LES codes. The results for the blade loads and the near wake obtained with the new coupling are consistent with the other codes. Deviations are observed in the far wake. The results further indicate that the FALM is able to reduce the lift and power overprediction from which the traditional ALM suffers on coarse LES grids. This new simulation environment paves the way for future wind farm simulations under realistic weather conditions by leveraging GRASP's ability to impose data from large‐scale meteorological models as boundary conditions.