AbstractTheory and experiment for premixed gaseous and premixed particle-cloud flames are discussed. The roles of low-temperature endothermicities in both kinds of premixed flames are found to be important determinants of flame properties, including extinction limits. Such findings are not found where truncated, overall reaction rate laws are used. Premixed stabilized lycopodium-air flames have been studied for upward (g = +1) and downward (g = −1) propagation under normal gravitational conditions, as well as under microgravity (g = 0) conditions. A single, self-contained apparatus was used in all studies. The roles of cold-boundary heat losses, flame structure, competing energy transport processes and gravitational conditions are identified and discussed. In general, gravitationally induced processes and omnidirectional radiative loss rates are found to be more significant flame structure determinants than are molecular conductive losses to cold boundaries.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Gravitational effects on the extinction conditions for premixed flames


    Beteiligte:
    Berlad, A.L. (Autor:in) / Joshi, N.D. (Autor:in)

    Erschienen in:

    Acta Astronautica ; 12 , 7-8 ; 539-545


    Erscheinungsdatum :

    1985-02-14


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Non-premixed turbulent CO/H2 flames at local extinction conditions

    Correa,S.M. / Gulati,A. / General Electric,Corporate Research and Development Center,US | Kraftfahrwesen | 1988


    Extinction Dynamics of Partially Premixed Spray Flames

    Greenberg, J. B. / Sarig, N. / Israel Society of Aeronautics and Astronautics | British Library Conference Proceedings | 1995


    Extinction and Near-Extinction Instability of Non-Premixed Tubular Flames

    Hu, Shengteng / Pitz, Robert / Wang, Yu | AIAA | 2007


    Laminar Burning Velocity of Synthetic Gas Premixed Flames Near Extinction Conditions

    Love, Norman / Periasamy, Chendhil / Gollahalli, Subramanyam et al. | AIAA | 2006


    Extinction and Cellular Instability of Premixed Tubular Flames

    Wang, Yu / Hu, Shengteng / Pitz, Robert | AIAA | 2008