We examine small deviations from axial symmetry in a solid-propellant rocket motor, and describe a 'bath-tub-vortex' effect, in which substantial axial vorticity is generated in a neighbourhood of the chamber centreline. The unperturbed flow field is essentially inviscid at modest Reynolds numbers, even at the chamber walls, as has long been known, but the inviscid perturbed flow is singular at the centreline, and viscous terms are required to regularize it. We examine perturbations sufficiently small that a linear analysis is valid everywhere ( epsilon Re small, where epsilon is a measure of the perturbation amplitude and Re is a Reynolds number), and larger perturbations in which a nonlinear patch is created near the centreline of radius O( square root epsilon ). Our results provide an explanation of swirl experimentally observed by others, and a cautionary note for those concerned with numerical simulations of these flows, whether laminar or turbulent.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The generation of axial vorticity in solid-propellant rocket-motor flows


    Contributors:

    Published in:

    Publication date :

    2001


    Size :

    23 Seiten, 10 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    SOLID PROPELLANT ROCKET MOTOR

    W. L. Dowler / J. I. Shafer / J. W. Behm et al. | NTIS | 1971


    Solid propellant rocket motor

    Dowler, W. L. / Shafer, J. I. / Behm, J. W. et al. | NTRS | 1973


    Solid Propellant Rocket Motor

    W. L. Dowler / J. I. Shafer / J. W. Behm et al. | NTIS | 1973


    Numerical Analysis of Solid Propellant Rocket Motor Internal Flows

    Arabshahi, A. / Webster, R. / Briley, R. et al. | British Library Conference Proceedings | 2006


    Numerical Analysis of Solid Propellant Rocket Motor Internal Flows

    Arabshahi, Abdollah / Webster, Robert / Briley, Roger et al. | AIAA | 2006