Experiments were conducted aboard Space Shuttle Orbiters during five different flights to study flame spread over a thin cellulosic fuel in a quiescent microgravity environment. Data, which include spread rate and temperature measurements in gas and solid phases, and also recordings of the flame from ignition to extinction using two 16-mm cameras, were gathered for two different oxygen levels and three different pressures. Detailed observation of the flame evolution is described along with theoretical support from steady and unsteady state models that include radiation from CO2 and H2O. Experimental results indicate that the spread rate increases with ambient oxygen level and pressure. The brightness of the flame and the visible soot radiation increases monotonically from the slowest to the fastest spreading flame. Steady-state theory compares well with experiments in the vicinity of the flame leading edge. Trends in temperature, spread rate, and structure of the flame are quantitatively reproduced in this region, but the feature of a flame trailing edge curving back to the fuel surface and flame evolution over time is only captured through an unsteady model.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The behavior of flames spreading over thin solids in microgravity


    Weitere Titelangaben:

    Das Verhalten von Flammen, die sich unter Mikrogravitationbedingungen über dünne Feststoffe ausbreiten


    Beteiligte:
    Ramachandra, P.A. (Autor:in) / Altenkirch, R.A. (Autor:in) / Bhattacharjee, S. (Autor:in) / Tang, L. (Autor:in) / Sacksteder, K. (Autor:in) / Wolverton, M.K. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1995


    Format / Umfang :

    14 Seiten, 6 Bilder, 12 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    EFFECT OF CONDUCTOR ON SPREADING FLAMES OVER WIRE IN MICROGRAVITY

    Takahashi, S. / Izumo, H. / Ito, H. et al. | British Library Conference Proceedings | 2013


    Effect of Conductor on Spreading Flames over Wire in Microgravity

    Takahashi, Shuhei / Izumo, Hirokazu / Ito, Hiroyuki et al. | AIAA | 2013


    Propane Cool Flames at Microgravity

    Gupta, Ashutosh | AIAA | 2008


    Propane Cool Flames at Microgravity

    Gupta, A. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2008


    Lifted Partially Premixed Flames in Microgravity

    Lock, Andrew / Ganguly, Ranjan / Puri, Ishwar et al. | AIAA | 2004