Pool boiling experiments in microgravity have been performed in the Sounding Rocket Maser 11. A heated plate of 1 cm2 was located at the bottom of a small cylindrical tank partly filled with a refrigerant Novec HFE7000 pressurized with Nitrogen. Experiments were performed at different reservoir pressures and wall heat fluxes. The wall heat flux and wall temperature were simultaneously measured during the experiment and the behavior of the bubbles on the heater was filmed with a video camera through the transparent wall of the reservoir. The presence of Nitrogen dissolved inside the liquid led to a strong Marangoni convection around the bubble. The effect of Marangoni convection and evaporation on the wall heat transfer is analyzed in function of the relative values of the wall temperature and saturation temperature.


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    Titel :

    Pool boiling with non-condensable gas in microgravity: Results of a sounding rocket experiment


    Weitere Titelangaben:

    Blasensieden mit nichtkondensierendem Gas unter Mikrogravitationsbedingungen: Ergebnisse eines Messraketenexperiments


    Beteiligte:


    Erscheinungsdatum :

    2010


    Format / Umfang :

    8 Seiten, 11 Bilder, 13 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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