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Theoretical and Experimental Identification of Acoustic Spinning Mode in a Cylindrical Combustor

Sliphorst, M. and Gröning, S. and Oschwald, M. (2011) Theoretical and Experimental Identification of Acoustic Spinning Mode in a Cylindrical Combustor. Journal of Propulsion and Power, Vol. 27 (No. 1), pp. 182-189.

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Abstract

The analytical solution for the eigenmodes of a cylindrical combustor allows for several realizations of the first tangential mode. The limiting cases of standing and spinning first tangential modes are well known. The general solution for a first tangential mode, however, allows for a large variety of realizations. In this study the analytical solution of the acoustic problem and a numerical time-resolved simulation of the acoustic pressure field are compared with experimental data from hot-fire tests. The experimentally observed pressure data are in excellent agreement with the simulation for all possible theoretical solutions. The approach enables detailed insight into the dynamics of the pressure field and thus constitutes a tool for the characterization of acoustic pressure waves in a cylindrical combustor even when the amplitude of the investigated eigenmode is small as compared with the mean pressure fluctuation.

Document Type:Article
Title:Theoretical and Experimental Identification of Acoustic Spinning Mode in a Cylindrical Combustor
Authors:
AuthorsInstitution or Email of Authors
Sliphorst, M.RA-RO LA
Gröning, S.Stefan.Groening@dlr.de
Oschwald, M.Michael.Oschwald@dlr.de
Date:January 2011
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol. 27
Page Range:pp. 182-189
Status:Published
Keywords:combustion, acoustics
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Antriebsystemtechnik - Schubkammertechnologie und Hochdruckverbrennung (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Raketenantriebe
Deposited By: Michaela Hanke
Deposited On:30 Nov 2011 10:16
Last Modified:07 Feb 2013 20:34

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