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Characterization and modeling of aperiodic pressure oscillations in combustion chambers

Sterling, James D. (1991) Characterization and modeling of aperiodic pressure oscillations in combustion chambers. AIAA Papers, AIAA 91-2082 . American Institute of Aeronautics and Astronautics .

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Classification of the long-term dynamical behavior of pressure oscillations in a laboratory combustion chamber has been performed using methods of modern dynamical systems theory. The method involves the construction of a phase-space representation from a single pressure record or time series using the time-delay embedding method. The pointwise correlation dimension of the resulting attractor in phase-space provides a lower bound on the number of modes that participate in the oscillations. The results show that the oscillations are quasiperiodic with a dimension near two over an order of magnitude of amplitudes. Quasiperiodicity is a result of the incommensurate frequencies of the system acoustic modes. A model for the dynamics is constructed by converting the governing equations to a kicked-oscillator model. When compared with the experimental data, the model results have similar pressure and velocity spectra and the attractor dimension verifies that quasiperiodic oscillations are present.

Item Type:Report or Paper (Report)
Additional Information:© 1991, AIAA. For permission to copy or republish, contact American Institute of Aeronautics and Astronautics. Lecturer in Jet Propulsion, Member AIAA
Group:Guggenheim Jet Propulsion Center
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Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
Series Name:AIAA Papers
Issue or Number:AIAA 91-2082
Record Number:CaltechAUTHORS:20101130-100452033
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21057
Deposited On:10 Dec 2010 00:41
Last Modified:03 Oct 2019 02:19

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