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 . http://resolver.caltech.edu/CaltechAUTHORS:20101130-100452033
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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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|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||10 Dec 2010 00:41|
|Last Modified:||26 Dec 2012 12:41|
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