Past experience with hybrid rockets has shown that certain motor operating conditions are conducive to the formation of low frequency pressure oscillations, or flow instabilities, within the motor. Both past and present work in the hybrid propulsion community acknowledges deficiencies in the understanding of such behavior, though it seems probable that the answer lies in an interaction between the flow dynamics and the combustion heat release. Knowledge of the fundamental flow dynamics is essential to the basic understanding of the overall stability problem. A first step in this direction was a study conducted at NASA Marshall Space Flight Center (MSFC), centered around a laboratory-scale two dimensional water flow model of a hybrid rocket motor. Principal objectives included: (1) visualization of flow and measurement of flow velocity distributions: (2) assessment of the importance of shear layer instabilities in driving motor pressure oscillations; (3) determination of the interactions between flow induced shear layers with the mainstream flow, the secondary (wall) throughflow, and solid boundaries; (4) investigation of the interactions between wall flow oscillations and the mainstream flow pressure distribution.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Cold-Flow Study of Low Frequency Pressure Instability in Hybrid Rocket Motors


    Contributors:

    Publication date :

    1997-05-08


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Non-Acoustic Combustion Instability in Hybrid Rocket Motors

    D. M. Guthrie / R. S. Wolf | NTIS | 1990


    NON-ACOUSTIC COMBUSTION INSTABILITY IN HYBRID ROCKET MOTORS

    Guthrie, D. M. / Wolf, R. S. / United States | British Library Conference Proceedings | 1990


    Low-frequency combustion instability in bipropellant rocket motors -- Experimental study

    Barrere, M. / Moutet, A. | Engineering Index Backfile | 1956


    High-frequency instability of combustion in solid rocket motors

    Pivkin, Nikolaj M. / Pelykn, Nikolai M. | AIAA | 1995