Evaluation of Various Turbulence Models for Turbulent Separated Flow over a Model Two-dimensional Bump

Xuehui Qian, Ramesh K. Agarwal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, performance of several turbulence models is evaluated by computing the turbulent separated flow over a 2D bump using the RANS equations. The turbulence models considered are the Spalart-Allmaras (SA), SST k-ω, and WrayAgarwal (WA) models. The geometry of the 2D bump is the centerline geometry of the NASA/Virginia Tech (VT) 3D BeVERLI hill bump. Since the experimental data is available only for the 3D bump, the goal of this paper is to compare the numerical solutions using the three turbulence models on a series of grids from coarse to fine. The experimental data of the 3D bump is also presented to evaluate the trends in the predicted pressure and velocity fields of the 2D bump. Three cases with three different freestream Reynolds numbers are computed. The surface pressure coefficients on the 2D bump and the velocity vectors are computed in the computational domain surrounding the 2D bump. The Wray-Agarwal model predicts results with similar trends as the 3D experimental data and gives results consistent with the other two models, which gives confidence in using the WA model for computing the turbulent separated flows. In addition, the WA model results show better agreement with the SST k-omega model results compared to the results from the Spalart-Allmaras model, which indicate good accuracy of the WA model. This paper presents an additional carefully generated test case for the turbulence modeling community for testing the turbulence models for turbulent separated flows.

Original languageEnglish
Title of host publicationAIAA Aviation Forum and ASCEND, 2024
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624107160
DOIs
StatePublished - 2024
EventAIAA Aviation Forum and ASCEND, 2024 - Las Vegas, United States
Duration: Jul 29 2024Aug 2 2024

Publication series

NameAIAA Aviation Forum and ASCEND, 2024

Conference

ConferenceAIAA Aviation Forum and ASCEND, 2024
Country/TerritoryUnited States
CityLas Vegas
Period07/29/2408/2/24

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