Theoretical and experimental values of the energy dissipated by liquids on the EXOSAT satellite are compared. The liquids are propane in an eccentric spherical tank and hydrazine in a centered membrane spherical tank. Liquid sloshing affects the time constant of the precession motion divergence of EXOSAT satellite and the fourth stage of the Ariane launcher. The theoretical analysis is limited to the pendulum type first mode motion and the first mode homogeneous vortex flow. The influence of gravity on these motions is estimated. The experimental measures were done by means of air bearing equipment using various tank positions, liquid filling and liquid viscosity. It is shown that the contribution of the first mode to the total dissipation of energy is small, indicating that the main energy dissipation is produced by internal motion modes.


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    Titel :

    Liquid Motion Effects on Spin-Stabilized Spacecraft. Volume 2: Exosat Satellite Theory-Experiment Comparison Influence des Liquides sur la Stabilite d'UN Satellite Tournant. Comparison Theorie - Experience Relative au Satellite Exosat


    Beteiligte:
    H. T. Huynh (Autor:in)

    Erscheinungsdatum :

    1982


    Format / Umfang :

    43 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch