Location
Toomey Hall, Room 140
Presentation Date
April 22, 2023, 8:30am-10:00am
Session
Session 5e
Description
The predictions of flow phenomenon that occur in high lift systems have proven to be challenging using the Reynolds-Averaged Navier-Stokes (RANS) equations with turbulence models. The complex interactions that occur among different elements of the wing can be difficult for turbulence models to accurately predict. Results from the recently developed Wray-Agarwal (WA) one-equation turbulence model, the frequently used Spalart-Allmaras (SA) and shear stress transport (SST) k-ω turbulence models are compared to experimental results to evaluate each model’s relative accuracy. The quadratic constitutive relation (QCR) is also used to produce results with the SA and WA models. It is shown that at lower angles of attack the computed lift from each turbulence model has similar accuracy as in the experimentally determined lift. At higher angles of attack, the WA model shows decreased accuracy while the SA and SST k-ω have similar accuracy. For other computed flow field quantities, the experimental data generally matches closest to the results from the SA model on a fine grid. In some cases, the WA and SST k-ω model have improved accuracy over the SA model on the same grid.
Meeting Name
32nd Annual Spring Meeting of the NASA-Mo Space Grant Consortium
Document Type
Presentation
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, all rights reserved.
Computations of Flow past a Three-Element 30P30N Airfoil Using Wray-Agarwal One Equation Turbulence Model
Toomey Hall, Room 140
The predictions of flow phenomenon that occur in high lift systems have proven to be challenging using the Reynolds-Averaged Navier-Stokes (RANS) equations with turbulence models. The complex interactions that occur among different elements of the wing can be difficult for turbulence models to accurately predict. Results from the recently developed Wray-Agarwal (WA) one-equation turbulence model, the frequently used Spalart-Allmaras (SA) and shear stress transport (SST) k-ω turbulence models are compared to experimental results to evaluate each model’s relative accuracy. The quadratic constitutive relation (QCR) is also used to produce results with the SA and WA models. It is shown that at lower angles of attack the computed lift from each turbulence model has similar accuracy as in the experimentally determined lift. At higher angles of attack, the WA model shows decreased accuracy while the SA and SST k-ω have similar accuracy. For other computed flow field quantities, the experimental data generally matches closest to the results from the SA model on a fine grid. In some cases, the WA and SST k-ω model have improved accuracy over the SA model on the same grid.
