To predict various phenomena related to flow and heat transfer in space, it is necessary to carry out experiments under microgravity. Considered are the characteristics of gas-liquid two-phase annular flow under microgravity condition utilizing a drop tower. The experiments were carried out in a vertical transparent acrylic tube of 10.5 mm inner diameter and 200 mm length, using a mixture of gaseous nitrogen and water as the working fluid, in an annular flow region. The mean void fraction, pressure drop and liquid film thickness under microgravity were obtained and compared with the results of a ground test. The roughness of the liquid film surface was less and the mean liquid film thickness became greater under microgravity than under normal gravity.


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    Title :

    Flow characteristics of gas-liquid two-phase annular flow under microgravity (Experimental results utilizing a drop tower)


    Additional title:

    Strömungseigenschaften zweiphasiger ringförmiger Strömung von Gas und Flüssigkeit unter Mikrogravitation (Experimentelle Ergebnisse mit einem Fallturm)


    Contributors:
    Fujii, T. (author) / Nakazawa, T. (author) / Asano, H. (author) / Yamada, H. (author) / Yoshiyama, T. (author)


    Publication date :

    1998


    Size :

    7 Seiten, 11 Bilder, 1 Tabelle, 11 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Two-Phase Flow Experiment under Microgravity Using a Drop Tower

    Okada, N. / Yamada, H. / Fujii, T. | British Library Conference Proceedings | 1996




    Thermocapillary Flow Under Microgravity-Experimental Results

    Kamotani, Y. / International Council of Scientific Unions; Committee on Space Research; Scientific Commission G | British Library Conference Proceedings | 1999