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Time Accurate Simulation of Nonequilibrium Flow Inside the NASA Ames Electric Arc Shock TubeNumerical investigations of the flowfield inside NASA Ames' Electric Arc Shock Tube have been performed. The focus is to simulate the experiments designed to reproduce shock layer radiation layer relevant to Earth re-entry conditions. This paper assess the current computational capability in simulating time-accurate unsteady nonequilibrium flows in the presence of strong shock waves with state-of-the-art physical models. The technical approach is described with preliminary results presented for one specific flow condition. It was found that the axisymmetric source term generates a numerical instability that appears as shock bending. This instability is time dependent which greatly affects the shock speed. Post-shock conditions are discussed and compared to CEA equilibrium prediction and good agreement was obtained close to the test-section and just behind the shock.
Document ID
20190025143
Acquisition Source
Ames Research Center
Document Type
Presentation
Authors
Bensassi, Khalil
(Analytical Mechanics Associates, Inc. Moffett Field, CA, United States)
Brandis, Aaron M.
(Analytical Mechanics Associates, Inc. Moffett Field, CA, United States)
Date Acquired
May 15, 2019
Publication Date
January 7, 2019
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
ARC-E-DAA-TN64558
Meeting Information
Meeting: AIAA SciTech Forum 2019
Location: San Diego, CA
Country: United States
Start Date: January 7, 2019
End Date: January 11, 2019
Sponsors: American Institute of Aeronautics and Astronautics (AIAA)
Funding Number(s)
CONTRACT_GRANT: NNA15BB15C
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
NASA Peer Committee
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