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Published 1974 | Published
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Comparison of approximate and numerical analyses of nonlinear combustion instability

Abstract

At the present time, there are three general analytical techniques available to study problems of unsteady motions in rocket motors: linear stability analysis; approximate nonlinear analysis, founded on examining the behavior of coupled normal modes; and numerical calculations based on the conservation equations for one-dimensional flows. The last two yield the linear results as a limit. It is the main purpose of this paper to check the accuracy of the approximate analysis against the numerical analysis for some special cases. The results provide some justification for using the approximate analysis to study three dimensional problems.

Additional Information

© 1974 AIAA. This work was supported partly by the National Aeronautics and Space Administration under the Jet Propulsion Laboratory Contract NAS 7-100; and partly by the Air Force Rocket Propulsion Laboratory under Contract No. F04611-71-C-0060.

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Created:
August 19, 2023
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January 13, 2024