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Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour
Open AccessArticle

Scale Effects on Solid Rocket Combustion Instability Behaviour

Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada
Energies 2011, 4(1), 90-107;
Received: 8 December 2010 / Revised: 13 December 2010 / Accepted: 29 December 2010 / Published: 11 January 2011
(This article belongs to the Special Issue Combustion for Aerospace Propulsion)
The ability to understand and predict the expected internal behaviour of a given solid-propellant rocket motor under transient conditions is important. Research towards predicting and quantifying undesirable transient axial combustion instability symptoms necessitates a comprehensive numerical model for internal ballistic simulation under dynamic flow and combustion conditions. A numerical model incorporating pertinent elements, such as a representative transient, frequency-dependent combustion response to pressure wave activity above the burning propellant surface, is applied to the investigation of scale effects (motor size, i.e., grain length and internal port diameter) on influencing instability-related behaviour in a cylindrical-grain motor. The results of this investigation reveal that the motor’s size has a significant influence on transient pressure wave magnitude and structure, and on the appearance and magnitude of an associated base pressure rise. View Full-Text
Keywords: combustion instability; solid rocket motor; scale effects combustion instability; solid rocket motor; scale effects
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Greatrix, D.R. Scale Effects on Solid Rocket Combustion Instability Behaviour. Energies 2011, 4, 90-107.

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