High fidelity CFD-CSD aeroelastic analysis of slender bladed horizontal-axis wind turbine

The Science of Making Torque from Wind

Sayed, M.^1 ; Lutz, Th.^1 ; Krämer, E.^1 ; Shayegan, Sh.^2 ; Ghantasala, A.^2 ; Wüchner, R.^2 ; Bletzinger, K.-U.^2

Institute of Aerodynamics and Gas Dynamics (IAG), University of Stuttgart, Pfaffenwaldring 21, Stuttgart

D-70569, Germany^1

Chr. of Structural Analysis, Technische Universitát München (TUM), Arcisstr. 21, München

D-80333, Germany^2

关键词: Aerodynamic predictions;    Aeroelastic analysis;    Aeroelastic response;    Blade-element momentums;    Comparative studies;    Horizontal axis wind turbine blades;    Horizontal axis wind turbines;    Unsteady reynolds averaged navier-stokes equations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/4/042009/pdf
DOI  :  10.1088/1742-6596/753/4/042009

来源: IOP

【 摘 要 】

The aeroelastic response of large multi-megawatt slender horizontal-axis wind turbine blades is investigated by means of a time-accurate CFD-CSD coupling approach. A loose coupling approach is implemented and used to perform the simulations. The block- structured CFD solver FLOWer is utilized to obtain the aerodynamic blade loads based on the time-accurate solution of the unsteady Reynolds-averaged Navier-Stokes equations. The CSD solver Carat++ is applied to acquire the blade elastic deformations based on non-linear beam elements. In this contribution, the presented coupling approach is utilized to study the aeroelastic response of the generic DTU 10MW wind turbine. Moreover, the effect of the coupled results on the wind turbine performance is discussed. The results are compared to the aeroelastic response predicted by FLOWer coupled to the MBS tool SIMPACK as well as the response predicted by SIMPACK coupled to a Blade Element Momentum code for aerodynamic predictions. A comparative study among the different modelling approaches for this coupled problem is discussed to quantify the coupling effects of the structural models on the aeroelastic response.