Abstract
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 × 106 and 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.
Highlights
In connection with the EU AVATAR project, dealing with the aerodynamics and aeroelasticity of the wind turbines of the future, a large effort is invested in the exploration of Computational Fluid Dynamics (CFD) codes
The continuous upscaling of wind turbines requires code validation for new flow regimes, where the Reynolds numbers increase above 10 × 106, and the Mach numbers may be in the range [0.01:0.3]
This paper presents the effort to make seven different Reynolds Averaged Navier-Stokes (RANS) CFD solvers provide consistent results
Summary
In connection with the EU AVATAR project, dealing with the aerodynamics and aeroelasticity of the wind turbines of the future, a large effort is invested in the exploration of Computational Fluid Dynamics (CFD) codes. The results from the CFD solvers will be used to develop the engineering methods used in industry to handle the upscaled turbines. The present work deals with a code comparison, that aims at establishing the requirement for the solvers to consistently predict both fully turbulent and transitional 2D airfoil flows. The focus is on conditions where the Mach number is 0.1 while the Reynolds number is varied from a moderate value of 3 × 106 to a high value of 15 × 106.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
