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Magnetohydrodynamic and Aerodynamic Assessment of Ballistic Entry of a 70deg Spherecone at Mars and VenusAn electrical conductivity database for continuum flow in a CO2 atmosphere over a 70 deg spherecone was created using the Data Parallel Line Relaxation Code computational fluid dynamics software to inform development of future magnetohydrodynamic subsystems at Venus and Mars. Sixteen freestream conditions were considered at Mars with atmospheric relative velocities from 5 to 8 km/s and altitudes between 20 and 80 km. Sixteen freestream conditions were considered at Venus with atmospheric relative velocities from 9 to 12 km/s and altitudes between 85 and 115 km. Results indicate that the total electrical conductivity in the flow volume always increases as velocity increases. At low velocities, the electrical conductivity is higher at high altitudes, while at high velocities, the electrical conductivity is higher at low altitudes. Three of the 80 km altitude computational fluid dynamics solutions show good agreement with Direct Simulation Monte Carlo results. In general, computational fluid dynamics predicts thinner shocks, higher electron number density, and similar vibrational temperatures as direct simulation Monte Carlo. The magnetohydrodynamic force was calculated at both Mars and Venus. Results indicate there may not be sufficient control authority to use magnetohydrodynamics as a trajectory control mechanism at Mars without artificially increasing the electrical conductivity of the flow, but there may be appreciable control authority for a drag-modulated aerocapture at Venus.
Document ID
20230017122
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Destiny M Fawley
(University of Illinois at Urbana Champaign Urbana, Illinois, United States)
Zachary R Putnam
(University of Illinois Urbana-Champaign Urbana, United States)
Sarah D'Souza
(Ames Research Center Mountain View, California, United States)
Ryan McDaniel
(Ames Research Center Mountain View, California, United States)
Arnaud Borner
(Analytical Mechanics Associates (United States) Hampton, Virginia, United States)
Date Acquired
November 22, 2023
Subject Category
Aerodynamics
Meeting Information
Meeting: AIAA SciTech Forum 2024
Location: Orlando, FL
Country: US
Start Date: January 8, 2024
End Date: January 12, 2024
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: 80NSSC20K1227
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Technical Review
NASA Peer Committee
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