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Some Influences of Noise on Combustion Instabilities and Combustor Dynamics

Seywert, C. and Culick, F. E. C. (1999) Some Influences of Noise on Combustion Instabilities and Combustor Dynamics. In: 36th JANNAF Combustion Meeting. .

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The chief purpose of this paper is to investigate the influences of noise, more generally stochastic sources of any sort, on linear and nonlinear unsteady motions in combustion chambers. To be definite, our primary applications here relate to combustion instabilities in solid propellant rockets, particularly linear stability. Two aspects are especially relevant to practical applications: the direct effects of noise on stability; and extraction of information about stability margin from noisy pressure records taken for stable motors. However, the formulation and results are relevant to combustors generally. A fundamental issue is the distinction between and relative importance of self-excited (linearly unstable) oscillations on the one hand and forced oscillation on the other. This has been a controversial and occasionally misunderstood topic for many years. The essential ideas can be clarified unambiguously within the context of global dynamics treated here. We are not so concerned with the details of data processing as with the physical interpretation of the results.

Item Type:Book Section
Additional Information:© 1999, Jannaf. This work was supported partly by the California Institute of Technology; partly by the Caltech Multidisciplinary University Research Initiative under ONR Grant No. N00014-95-1-1338 (Dr. Judah Goldwasser, Program Manager); partly by the Air Force Office of Scientific Research (Dr. Mitat Birkan, Program Manager); partly by ENEL (Dr. Giancarlo Benelli, Program Manager); and partly by the Department of Energy Advanced Gas Turbine Systems Research (AGTSR) Program under Subcontract No. 98-02-SR072 (Dr. Larry Golan, Program Manager).
Group:Guggenheim Jet Propulsion Center, GALCIT
Funding AgencyGrant Number
Caltech Multidisciplinary University Research InitiativeONR N00014-95-1-1338
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Department of Energy Advanced Gas Turbine Systems Research (AGTSR)98-02-SR072
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Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
Record Number:CaltechAUTHORS:20101118-105039121
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Official Citation:Some Influences of Noise on Combustion Instabilities and Combustor Dynamics", F.E.C. Culick and C. Seywert, 36th JANNAF Combustion Meeting, Cocoa Beach, Florida, Oct 99.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20888
Deposited By: Ruth Sustaita
Deposited On:18 Nov 2010 21:34
Last Modified:03 Oct 2019 02:16

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