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Nonlinear analysis of pressure oscillations in ramjet engines

Yang, Vigor and Culick, Fred E. C. (1986) Nonlinear analysis of pressure oscillations in ramjet engines. AIAA Papers, AIAA-1986-1. American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20110126-104752906

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Abstract

Pressure oscillations in ramjet engines have been studied using an approximate method which treats the flow fields in the inlet and the combustor separately. The acoustic fields in the combustor are expressed as syntheses of coupled nonlinear oscillators corresponding to the acoustic modes of the chamber. The influences of the inlet flow appear in the admittance function at the inlet /combustor interface, providing the necessary boundary condition for calculation of the combustor flow. A general framework dealing with nonlinear multi-degree-of-freedom system has also been constructed to study the time evolution of each mode. Both linear and nonlinear stabilities are treated. The results obtained serve as a basis for investigating the existence and stabilities of limit cycles for acoustic modes. As a specific example, the analysis is applied to a problem of nonlinear transverse oscillations in ramjet engines.


Item Type:Report or Paper (Report)
Additional Information:© 1986, AIAA. This work was supported partly by the California Institute of Technology, and partly by the Department of the Navy, ONR Contract N00014-84-K-0434.
Group:Guggenheim Jet Propulsion Center
Funders:
Funding AgencyGrant Number
CaltechUNSPECIFIED
Department of the Navy/ONRN0014-84-K-0434
Pennsylvania State UniversityUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion Center UNSPECIFIED
Record Number:CaltechAUTHORS:20110126-104752906
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110126-104752906
Official Citation:Nonlinear analysis of pressure oscillations in ramjet engines YANG, V., Pennsylvania State University, University Park; CULICK, F.E. C., California Institute of Technology, Pasadena AIAA-1986-1 Aerospace Sciences Meeting, 24th, Reno, NV, Jan 6-9, 1986. 13p. Research supported by Pennsylvania State University
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21898
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:09 Feb 2011 22:35
Last Modified:26 Dec 2012 12:52

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