Repository: Freie Universit├Ąt Berlin, Math Department

A zero-Mach solver and reduced order acoustic representations for modeling and control of combustion instabilities

Moeck, J. and Scharfenberg , C. and Paschereit, O. C. and Klein, R. (2010) A zero-Mach solver and reduced order acoustic representations for modeling and control of combustion instabilities. Active Flow Control II, Notes on Numerical Fluid Mechanics and Multidisciplinary Design,, 108/2010 . pp. 291-306. ISSN 978-3-642-11734-3

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Official URL: http://www.springerlink.com/content/jg47817r537030...

Abstract

Thermoacoustic instabilities are a serious problem for lean premixed combustion systems. Due to different time and length scales associated with the flow field, combustion, and acoustics, numerical computations of thermoacoustic phenomena are conceptually challenging. Using these methods to successfully design active control strategies is therefore difficult. This work presents a coupled method for the simulation of thermoacoustic instabilities in low Mach number reacting flows. The acoustics are represented by an experimentally identified reduced order model. A zero-Mach solver is used for the flame dynamics on the hydrodynamic scale. Two control schemes are employed to suppress thermoacoustic oscillations, equivalence ratio modulation and control of the acoustic boundary conditions. Both methods are shown to be capable of effectively diminishing the instability.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group
ID Code:1026
Deposited By: Ulrike Eickers
Deposited On:03 Feb 2011 08:36
Last Modified:03 Feb 2011 08:36

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