A computational campaign was performed to run high-fidelity, free-flight simulations of a human-scale Mars lander concept vehicle decelerating under retropropulsion through the Martian atmosphere with closed-loop flight control. A novel approach is used to couple computational fluid dynamics (CFD) software with a mature flight mechanics package, where the two applications communicate in real-time across two geographically-dispersed computational facilities. The CFD is performed on the Frontier exascale system located at Oak Ridge National Laboratory, and the flight mechanics are executed on a system located at NASA Langley Research Center. In the current campaign, CFD is performed using finite-rate chemistry to account for the interactions between the LOXCH4 engines and the CO2 Martian atmosphere. A simulation of a closed-loop main engine throttling and RCS actuation is presented, demonstrating that the vehicle and model are able to maintain stability in a long-duration CFD-in-the-loop flight simulation. Comparisons are made to a reduced order model ignoring aero-propulsive interactions.


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    Title :

    Closed-Loop Simulations of Human-Scale Mars Lander Descent Trajectories on Frontier


    Contributors:
    G. C. Nastac (author) / Z. Ernst (author) / A. M. Hickey (author) / A. C. Walden (author) / K. E. Jacobson (author) / W. T. Jones (author) / E. J. Nielsen (author) / B. Diskin (author) / L. Wang (author) / A. M. Korzun (author)

    Publication date :

    2024


    Size :

    19 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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