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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    Titel :

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


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

    Erscheinungsdatum :

    2024


    Format / Umfang :

    19 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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