Abstract
This paper presents the development and testing of a variable structure factor (shear stress anisotropy) model used to modify the Menter SST turbulence model to render it more accurate for hypersonic shock/boundary layer interactions (SBLIs) The model is constructed using ‘exact’ distributions of the structure factor extracted from prior LES-type simulations of several canonical hypersonic SBLIs (axisymmetric cylinder/flare interactions, impinging shock interactions, and crossing shock interactions) and is based on an equation learning neural net method. The output is a flow-dependent model that replaces the constant value of the structure factor (0.31) that is used in the Menter SST formulation. Testing a suite of hypersonic SBLIs cases shows the new formulation provides significant gains in accuracy to the extent of axial separation and peak heat transfer for stronger interactions. The model does not perform quite as well for weaker interactions, producing results very similar to Menter’s baseline (BSL) model.
| Original language | English |
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| Title of host publication | AIAA SciTech Forum and Exposition, 2024 |
| Publisher | American Institute of Aeronautics and Astronautics Inc, AIAA |
| ISBN (Print) | 9781624107115 |
| DOIs | |
| State | Published - 2024 |
| Event | AIAA SciTech Forum and Exposition, 2024 - Orlando, United States Duration: Jan 8 2024 → Jan 12 2024 |
Publication series
| Name | AIAA SciTech Forum and Exposition, 2024 |
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Conference
| Conference | AIAA SciTech Forum and Exposition, 2024 |
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| Country/Territory | United States |
| City | Orlando |
| Period | 01/8/24 → 01/12/24 |
Funding
This work is supported by the DoD HPCMP Hypersonic Vehicle Simulation Institute under Cooperative Agreement FA7000-19-2-0004 (TPOC: Dr. Russell Cummings, USAFA). Computer time on NASA’s Pleiades architecture was obtained from NASA’s Aeronautics Mission Directorate, through Space Act Agreement SAA1-23398, Annex 4, between NASA Langley Research Center and North Carolina State University.