Characterization and modeling of aperiodic pressure oscillations in combustion chambers
- Creators
- Sterling, James D.
Abstract
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.
Additional Information
© 1991, AIAA. For permission to copy or republish, contact American Institute of Aeronautics and Astronautics. Lecturer in Jet Propulsion, Member AIAAAttached Files
Published - 320_Sterling_JD_1991.pdf
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Additional details
- Eprint ID
- 21057
- Resolver ID
- CaltechAUTHORS:20101130-100452033
- Created
-
2010-12-10Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Guggenheim Jet Propulsion Center
- Series Name
- AIAA Papers
- Series Volume or Issue Number
- AIAA 91-2082
- Other Numbering System Name
- AIAA
- Other Numbering System Identifier
- 91-2082