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Turbulent Aeroheating Measurements on a 7-deg Half-Angle Sphere-Cone in a High-Enthalpy CO2 Expansion TunnelA database of heating and pressure measurements on a 7-deg half-angle cone in a highenthalpy expansion tunnel in CO2 has been generated to support development and validation of computational models to be employed in the design of future Mars missions. Laminar, transitional, and turbulent simulations were performed at the test conditions for comparisons with the data. Close agreement was obtained for both fully-laminar and fully turbulent conditions. For the remaining transitional/turbulent conditions, agreement to within, or slightly more than, the estimated experimental uncertainty was demonstrated. The influence of transition intermittency and transition length models on predicted heating levels was demonstrated, as were differences in turbulent heating predictions generated using various algebraic, one-equation, and two-equation turbulence models. These comparisons provide some measure of confidence in turbulent simulation capabilities; however, because the data were not obtained on a relevant entry vehicle geometry, it is not possible to fully quantify computational uncertainties for the definition of Mars mission aerothermodynamic environments at this time
Document ID
20190028328
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Brian R Hollis (Langley Research Center Hampton, Virginia, United States)
Michael D Barnhardt (Ames Research Center Mountain View, California, United States)
Matthew Maclean (Calspan-University of Buffalo Research Center Buffalo, New York, United States)
Aaron Dufrene (Calspan-University of Buffalo Research Center Buffalo, New York, United States)
Timothy Wadhams (Calspan-University of Buffalo Research Center Buffalo, New York, United States)
Date Acquired
July 30, 2019
Publication Date
January 7, 2018
Publication Information
DOI: doi:10.2514/6.2018-0377
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NF1676L-29376
Meeting Information
Meeting: AIAA SciTech Forum: 2018 AIAA Aerospace Sciences Meeting
Location: Kissimee, Florida
Country: US
Start Date: January 8, 2018
End Date: January 12, 2018
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NNX12AG48A
Distribution Limits
Public
Copyright
Public Use Permitted.

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