Numerical Study of the Effects of Longitudinal Acceleration on Solid Rocket Motor Internal Ballistics

[+] Author and Article Information
J. J. Gottlieb

Institute for Aerospace Studies, University of Toronto, Ontario, Canada M3H 5T6

D. R. Greatrix

Surveillance Systems Division, Bombardier Canadair, Montreal, Quebec, Canada H3C 3G9

J. Fluids Eng 114(3), 404-410 (Sep 01, 1992) (7 pages) doi:10.1115/1.2910045 History: Received January 22, 1991; Online May 23, 2008


The internal ballistics of a solid-propellant rocket motor subjected to both constant and oscillatory longitudinal accelerations are studied. The one-dimensional time-dependent equations of motion governing the unsteady two-phase core flow in the accelerating motor chamber and nozzle are solved numerically by using the random-choice method, along with pressure-dependent and crossflow-dependent burning-rate equations for propellant combustion. A constant forward acceleration produces negligible effects, whereas longitudinal motor vibrations near the natural frequency of waves criss-crossing the length of the motor chamber can produce large but bounded oscillatory motor-chamber pressures.

Copyright © 1992 by The American Society of Mechanical Engineers
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