Vortex Particle-Mesh simulations of Vertical Axis Wind Turbine flows: from the blade aerodynamics to the very far wake

The Science of Making Torque from Wind

Chatelain, P.^1 ; Duponcheel, M.^1 ; Caprace, D.-G.^1 ; Marichal, Y.^2 ; Winckelmans, G.^1

Institute of Mechanics, Materials and Civil Engineering, Université Catholique de Louvain, Louvain-la-Neuve

1348, Belgium^1

Wake Prediction Technologies (WaPT), Rue Louis de Geer 6, Louvain-la-Neuve

1348, Belgium^2

关键词: Blade aerodynamic;    Blade elements;    Coherent vortices;    Rotor diameter;    Topological flows;    Unsteady vortices;    Vertical axis wind turbines;    Vortex particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/3/032007/pdf
DOI  :  10.1088/1742-6596/753/3/032007

来源: IOP

【 摘 要 】

A Vortex Particle-Mesh (VPM) method with immersed lifting lines has been developed and validated. Based on the vorticity-velocity formulation of the Navier-Stokes equations, it combines the advantages of a particle method and of a mesh-based approach. The immersed lifting lines handle the creation of vorticity from the blade elements and its early development. LES of Vertical Axis Wind Turbine (VAWT) flows are performed. The complex wake development is captured in details and over very long distances: from the blades to the near wake coherent vortices, then through the transitional ones to the fully developed turbulent far wake (beyond 10 rotor diameters). The statistics and topology of the mean flow are studied. The computational sizes also allow insights into the detailed unsteady vortex dynamics, including some unexpected topological flow features.