A three-dimensional, unstructured-grid, pressure-based, reacting flow, computational fluid dynamics (CFD) and heat transfer methodology was employed to study the base-heating environment of a lunar lander demonstrator, during terrestrial ground testing. Two base-heating environments were investigated: lunar lander demonstrator sitting on pad, and lunar lander demonstrator hovering at a distance above ground. Two unique and quite different base-flow physics are found for these two cases. In the case of demonstrator sitting on pad, the computed heat fluxes are high and the base flow is unsteady, caused by a Coanda effect precursor that makes the fountain jet oscillate about the center of the base. For the second case, due to the higher elevation of the demonstrator and the layout of the nozzles, the Coanda effect forces the fountain jet to be attached to two of the nozzle plumes, resulting in much lower computed base heat fluxes.


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    Title :

    Analysis of Base-Heating Environment During Ground Testing of a Lunar Lander Demonstrator


    Contributors:
    Wang, T. S. (author) / Canabal, F. (author) / Knox, K. S. (author) / Hawkins, R. F. (author) / Bergman, M. (author)

    Conference:

    Joint Army-Navy-NASA-Air Force (JANNAF) Combustion (CS) Subcommittee Meeting ; 2019 ; Dayton, OH, United States
    Joint Army-Navy-NASA-Air Force (JANNAF) Airbreathing Propulsion (APS) Subcommittee Meeting ; 2019 ; Dayton, OH, United States
    Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion (JPM) and Programmatic and Industrial Base (PIB) Subcommittee Meeting ; 2019 ; Dayton, OH, United States
    Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Systems Hazards (PSHS) Subcommittee Meeting ; 2019 ; Dayton, OH, United States
    Joint Army-Navy-NASA-Air Force (JANNAF) Exhaust Plume and Signatures (EPSS) Subcommittee Meeting ; 2019 ; Dayton, OH, United States


    Publication date :

    2019-06-03


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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