Location
Havener Center, St. Pat's Ballroom C
Presentation Date
April 21, 2023, 12:40pm - 1:40pm
Session
Session 2
Description
This paper describes the problem setup, implementation, and numerical results obtained with the commercial CFD software ANSYS Fluent to test the accuracy of the one equation Wray-Agarwal (WA) turbulence model in comparison to the commonly used one-equation Spalart-Allmaras (SA) turbulence model by computing two axisymmetric benchmark problems, namely the subsonic flow past an axisymmetric after-body and the transonic flow past Sandia axisymmetric bump. The axisymmetric after-body case features low speed flow in near separation conditions where it was found that the Wray- Agarwal model and the Spalart-Allmaras model produced nearly identical results. The Sandia transonic axisymmetric bump case features a complex flow in which shock induced separation occurs over the geometry. In this test case the Wray-Agarwal model was seen to improve accuracy over the Spalart-Allmaras model in terms of pressure distribution and separation prediction on the bump.
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.
Application of Wray-Agarwal Turbulence Model to Axisymmetric Subsonic and Transonic Flows
Havener Center, St. Pat's Ballroom C
This paper describes the problem setup, implementation, and numerical results obtained with the commercial CFD software ANSYS Fluent to test the accuracy of the one equation Wray-Agarwal (WA) turbulence model in comparison to the commonly used one-equation Spalart-Allmaras (SA) turbulence model by computing two axisymmetric benchmark problems, namely the subsonic flow past an axisymmetric after-body and the transonic flow past Sandia axisymmetric bump. The axisymmetric after-body case features low speed flow in near separation conditions where it was found that the Wray- Agarwal model and the Spalart-Allmaras model produced nearly identical results. The Sandia transonic axisymmetric bump case features a complex flow in which shock induced separation occurs over the geometry. In this test case the Wray-Agarwal model was seen to improve accuracy over the Spalart-Allmaras model in terms of pressure distribution and separation prediction on the bump.
