Abstract A rocket plume impinging on the lunar surface when a lunar lander approaches a landing site can cause significant dust dispersal. This study investigated the near-field rocket plume-lunar surface interaction and subsequent regolith erosion and particle dispersal. These subjects are challenging because of the complicated flow physics associated with the inherently multi-physics multi-scale problem, and the special lunar conditions, characterized by micro-gravity, near-vacuum, extreme dryness, and the unique properties of the regolith. Gas expansion into the near-vacuum lunar condition compared to exhaust gas under terrestrial circumstances varies not only in the shape of plume but also in the pressure profile on the surface. To understand the effect of surface erosion on flow characteristics, in conjunction with the finite volume method of plume impingement of a rocket nozzle, the Roberts erosion model was introduced for the influx mass flow rate of dust particles based on excess shear stress. The particulate phase was then handled in a Lagrangian framework using the discrete phase model. A parametric study on erosion rate was also conducted to examine the effect of particle density, particle diameter, Mach number, and hover altitude. Additionally, the maximum speed and inclined angle of the particles from the surface were computed for various particle diameters and hover altitudes. The resulting information about the pressure and heat flux distribution on lunar module components can be used for engineering design. Finally, high-fidelity simulations of particles eroded from the surface indicated that several scenarios may occur depending on particle diameters, grain-inclined angles from the surface, and hover altitudes.

    Highlights Several scenarios possible depending on particle diameter, surface angle, altitude. Near-field interaction of the multiple plumes at low altitude is near equilibrium. Maximum particle velocity decreases with particle diameter irrespective of altitude. High pressure and hot spots on the legs, the connectors, the bottom of the module.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Near-field plume-surface interaction and regolith erosion and dispersal during the lunar landing


    Beteiligte:
    Rahimi, A. (Autor:in) / Ejtehadi, O. (Autor:in) / Lee, K.H. (Autor:in) / Myong, R.S. (Autor:in)

    Erschienen in:

    Acta Astronautica ; 175 ; 308-326


    Erscheinungsdatum :

    2020-05-21


    Format / Umfang :

    19 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Deep Regolith Cratering and Plume Effects Modeling for Lunar Landing Sites

    Kuhns, Matthew / Metzger, Philip / Dove, Adrienne et al. | TIBKAT | 2021


    Deep Regolith Cratering and Plume Effects Modeling for Lunar Landing Sites

    Kuhns, Matthew / Metzger, Philip / Dove, Adrienne et al. | ASCE | 2021




    Analysis of plume–lunar surface interaction and soil erosion during the Chang’E-4 landing process

    You, Jilin / Zhang, Xiaoping / Zhang, Haiyan et al. | Elsevier | 2021