CFD code comparison for 2D airfoil flows

The Science of Making Torque from Wind

Sørensen, Niels N.^1 ; Méndez, B.^2 ; Muñoz, A.^2 ; Sieros, G.^3 ; Jost, E.^4 ; Lutz, T.^4 ; Papadakis, G.^5 ; Voutsinas, S.^5 ; Barakos, G.N.^6 ; Colonia, S.^6 ; Baldacchino, D.^7 ; Baptista, C.^7 ; Ferreira, C.^7

DTU Wind Energy, Technical University of Denmark, Risø Campus, Denmark^1

CENER, Av Ciudad de la Innovacion 7, Sarriguren, Navarra

31621, Spain^2

CRES, Wind Energy Dept., Pikermi, Greece^3

Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, Germany^4

National Technical University of Athens, Greece^5

School of Engineering, University of Glasgow, United Kingdom^6

Delft University of Technology, Netherlands^7

关键词: 2D airfoils;    Best practices;    CFD codes;    Convergence criterion;    Domain size;    Drag ratio;    Grid resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/8/082019/pdf
DOI  :  10.1088/1742-6596/753/8/082019

来源: IOP

【 摘 要 】

The current paper presents the effort, in the EU AVATAR project, to establish the necessary requirements to obtain consistent lift over drag ratios among seven CFD codes. The flow around a 2D airfoil case is studied, for both transitional and fully turbulent conditions at Reynolds numbers of 3 × 106and 15 × 106. The necessary grid resolution, domain size, and iterative convergence criteria to have consistent results are discussed, and suggestions are given for best practice. For the fully turbulent results four out of seven codes provide consistent results. For the laminar-turbulent transitional results only three out of seven provided results, and the agreement is generally lower than for the fully turbulent case.