Reduced-gravity experiments on combustion of individual 1-propanol droplets with initial diameters of about 1 mm were conducted in air at standard temperature and with pressures ranging from 0.1 MPa to 1.0 MPa. Flames at 0.1 MPa were non-sooting with blue coloring during most of the combustion process. At higher pressures, flames exhibited significant amounts of soot during most of the combustion history. Flames were also non-spherical at elevated pressure, which is likely a result of the increased importance of buoyant convection at elevated pressure. Droplet burning rates increased as the ambient pressure was increased. Empirical correlations indicate that buoyant convection did not significantly influence droplet burning rates. Calculations indicate, however, that increasing the ambient pressure increased the liquid temperature, which decreased the liquid density and enthalpy of vaporization, leading to burning rate increases that are consistent with experimental results. Calculations also indicate that absorption of water into droplets was not significant in the experiments.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Influences of pressure on reduced-gravity combustion of 1-propanol droplets


    Additional title:

    Einfluss von Druck auf die Verbrennung von 1-Propanoltröpfchen bei reduzierter Schwerkraft


    Contributors:
    Dakka, S.M. (author) / Shaw, B.D. (author)

    Published in:

    Publication date :

    2006


    Size :

    9 Seiten, 10 Bilder, 1 Tabelle, 20 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    High Pressure Vaporization and Burning of Methanol Droplets in Reduced Gravity

    Chauveau, C. / Chesneau, X. / Goekalp, I. et al. | British Library Conference Proceedings | 1995


    High pressure vaporization and burning of methanol droplets in reduced gravity

    Chauveau, C. / Chesneau, X. / Gokalp, I. | AIAA | 1994


    Bubbles and Droplets in Tubing in Reduced Gravity

    Collicott, S. H. / American Society of Civil Engineers | British Library Conference Proceedings | 2006