Results are presented on the aerodynamic characteristics of the Magellan spacecraft during the October 1994 Termination Experiment, including the effects of the thruster engine exhaust plumes upon the molecular free stream around the spacecraft and upon the aerodynamics coefficients. As Magellan passed through the Venusian atmosphere, the solar arrays were turned in opposite directions relative to the free stream creating a torque on the spacecraft. The spacecraft control system was programmed to counter the effects of this torque with attitude control engines to maintain an inertially fixed attitude. The orientation and reaction engine telemetry returned from Magellan are used to create a model of the aerodynamic torques. Geometric models of the Magellan spacecraft are analyzed with the aid of both free molecular and Direct Simulation Monte Carlo codes. The simulated aerodynamic torques determined are compared to the measured torques. The Direct Simulation Monte Carlo method is also used to model the attitude engine exhaust plumes, the free stream disturbance caused by these plumes, and the resulting torques acting on the spacecraft compared to no-exhaust plume cases. The effect of the exhaust plumes was found to be sufficiently large that thrust reversal is possible.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Magellan Aerodynamic Characteristics During the Termination Experiment Including Thruster Plume-Free Stream Interaction


    Beteiligte:

    Erscheinungsdatum :

    1998-03-01


    Medientyp :

    Hochschulschrift


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Free-flight experiment and numerical simulation for cold thruster plume

    Ivanov, M. / Markelov, G. / Gerasimov, Yu. et al. | AIAA | 1998


    Free-Flight Experiment and Numerical Simulation for Cold Thruster Plume

    M. S. Ivanov / G. N. Markelov / Yu. I. Gerasimov et al. | AIAA | 1999


    BPT Hall thruster plume characteristics

    de Grys, Kristi / Tilley, Dennis / Aadland, Randy | AIAA | 1999


    Plume characteristics of an arcjet thruster

    Liebeskind, John G. / Hanson, Ronald K. / Cappelli, Mark A. | NTRS | 1993


    Plume characteristics of an arcjet thruster

    LIEBESKIND, JOHN / HANSON, RONALD / CAPPELLI, MARK | AIAA | 1993