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Shear layer instability and acoustic interaction in solid propellant rocket motors

✍ Scribed by A. Kourta

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
232 KB
Volume
25
Category
Article
ISSN
0271-2091

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✦ Synopsis

Segmentation of solid propellant rocket motors has been demonstrated to be a source of unpredicted and undesirable pressure and thrust oscillations. Surface discontinuities are the primary cause of these vortex-sheddingdriven oscillations, which result from a strong coupling between the shear layer instability and the acoustic motion in the chamber. The analysis of an axisymmetric geometry corresponding to a 1 15 subscale P230 motor of the Ariane 5 rocket is numerically computed. With a suitable mesh for the viscosity value studied, the aeroacoustics in the chamber is fully described. A coupling between the hydrodynamic instability and the organ-pipe acoustic mode is clearly demonstrated. The mechanism for frequency selection is discussed.

πŸ“œ SIMILAR VOLUMES

ACOUSTIC–MEAN FLOW INTERACTION AND VORTE
ACOUSTIC–MEAN FLOW INTERACTION AND VORTEX SHEDDING IN SOLID ROCKET MOTORS
✍ A. KOURTA πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 898 KB

The present work is devoted to the numerical simulation of two important phenomena in the field of solid propellant rocket motors: the first is acoustic boundary layers that develop above the burning propellant; the other is a periodic vortex-shedding phenomenon which is the result of a strong coupl