CaltechAUTHORS
  A Caltech Library Service

Nonlinear Dynamics of Laboratory Combustor Pressure Oscillations

Sterling, J. D. and Zukoski, E. E. (1991) Nonlinear Dynamics of Laboratory Combustor Pressure Oscillations. Combustion Science and Technology, 77 (4-6). pp. 225-238. ISSN 0010-2202. http://resolver.caltech.edu/CaltechAUTHORS:20101130-110248831

[img] PDF - Published Version
Restricted to Repository administrators only
See Usage Policy.

519Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20101130-110248831

Abstract

The mechanisms responsible for driving and damping of pressure oscillations in a laboratory combustor have been investigated. The chamber contains a turbulent methane/hydrogen/air premixed flame stabilized behind a rearward-facing step. Shadowgraph cinematography reveals the shedding of large vortices from the step at frequencies of the system acoustic modes. Variations in the fuel equivalence ratio and the mean flow speed result in a wide variety of nonlinear dynamical behavior. Typically, large cycle-to-cycle variations are observed such that energy may be added or subtracted over one cycle of oscillation but zero net energy change occurs many cycles of oscillation. A quantitative version of Rayleigh's Criterion is constructed by using the cross-spectral-density of the measured flame radiation and pressure. The results under one set of operating conditions show that large driving near the flameholder is balanced by equally large damping further downstream. A second set of conditions results in large energy addition to an acoustic mode balanced by attenuation at the mode subharmonic.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1080/00102209108951729 DOIUNSPECIFIED
http://www.informaworld.com/10.1080/00102209108951729PublisherUNSPECIFIED
Additional Information:© 1991 Gordon and Breach. Received July 20, 1990; in final form January 30, 1991. The authors would like to thank Professor Toshi Kubota for helpful comments made during this work. The research was supported by the Air Force Office of Scientific Research under the technical management of Dr J. Tishkoff.
Group:Guggenheim Jet Propulsion Center
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Subject Keywords:Combustion instabilities; Rayleigh's criterion; Dynamical systems
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
Record Number:CaltechAUTHORS:20101130-110248831
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101130-110248831
Official Citation:Nonlinear Dynamics of Laboratory Combustor Pressure Oscillations J. D. Sterling; E. E. Zukoski Pages 225 – 238
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21060
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:01 Dec 2010 18:31
Last Modified:26 Dec 2012 12:41

Repository Staff Only: item control page