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Application of a Detached Eddy Simulation Approach with Finite-Rate Chemistry to Mars-Relevant Retropropulsion Operating EnvironmentsHuman-scale Mars vehicles will require retropropulsion for descent and landing, replacing heritage supersonic parachute systems with an extended phase of powered flight. Due to the limitations of terrestrial testing in Mars-relevant conditions, design and analysis will increasingly rely on computational modeling and simulation. This paper provides an overview of a computational campaign investigating the aerodynamics of a Mars lander concept along various points on a powered descent trajectory including supersonic, transonic, and subsonic conditions using finite-rate chemistry. Simulations using unstructured grids containing billions of elements are performed at scale using thousands of Graphics Processing Units, enabling run-times of a few days for each simulation presented. At each freestream condition, significant minor species concentrations are observed external to the nozzles in the large mixing region upstream of the vehicle. While the flowfields are highly non-stationary in all cases, the mean integrated forces and moments on the vehicle remain small in comparison to the deceleration provided through retropropulsion.
Document ID
20210024958
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Ashley Korzun
(Langley Research Center Hampton, Virginia, United States)
Gabriel Nastac
(Langley Research Center Hampton, Virginia, United States)
Aaron Walden
(Langley Research Center Hampton, Virginia, United States)
Eric Nielsen
(Langley Research Center Hampton, Virginia, United States)
William Jones
(Langley Research Center Hampton, Virginia, United States)
Patrick Moran
(Ames Research Center Mountain View, California, United States)
Date Acquired
November 26, 2021
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: AIAA SciTech Forum
Location: San Diego, CA
Country: US
Start Date: January 3, 2022
End Date: January 7, 2022
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
WBS: 335803.04.21.23
CONTRACT_GRANT: DE-AC05-00OR22725
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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