Simulation of Wingtip Vortex Flows with Reynolds-Averaged Navier–Stokes and Scale-Resolving Simulation Methods

The simulation of wingtip vortex flows is investigated with Reynolds-averaged Navier–Stokes (RANS) equations and scale-resolving simulation (SRS) models. These range from turbulent viscosity and Reynolds-stress model (RSM) RANS closures, to hybrid and bridging SRS methods. The objective of the study...

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Bibliographic Details
Published in:AIAA journal 2019-03, Vol.57 (3), p.932-948
Main Authors: Pereira, Filipe S, Eça, Luís, Vaz, Guilherme
Format: Article
Language:English
Subjects:
Angle of attack
Closures
Computational fluid dynamics
Computer simulation
ENGINEERING
Fluid flow
Mathematical models
Model accuracy
Navier-Stokes equations
Predictions
Replication
Reynolds averaged Navier-Stokes method
Reynolds number
Rotating bodies
Simulation
Turbulence
Viscosity
Vortices
Wing tip vortices
Wing tips
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Summary:The simulation of wingtip vortex flows is investigated with Reynolds-averaged Navier–Stokes (RANS) equations and scale-resolving simulation (SRS) models. These range from turbulent viscosity and Reynolds-stress model (RSM) RANS closures, to hybrid and bridging SRS methods. The objective of the study was threefold: assess the relevance of replicating the experimental flow conditions, evaluate the numerical requisites of each mathematical model, and determine their modeling accuracy in prediction of a representative wingtip vortex flow. The selected problem is the flow around a NACA 0012 wing at 10 deg of angle of attack and Reynolds number of 4.60×106. The results confirm the relevance of reproducing the experimental flow conditions, in particular at the inlet boundary where the flow is not uniform. For this reason, the evaluation of modeling errors using the available measurements requires the specification of the experimental inlet conditions. On the other hand, the quantification of the modeling error indicates that solely RANS–RSM can achieve an accurate representation of the flow dynamics. Whereas the well-recognized limitations of turbulent viscosity RANS closures to deal with solid-body rotation lead to the overprediction of turbulence and consequent rapid diffusion of the wingtip vortex, the predictive use of SRS methods may reveal excessively complex and demanding.
ISSN:0001-1452
1533-385X
DOI:10.2514/1.J057512