Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume

A feedback control strategy is developed for mitigating combustion instabilities using a Helmholtz resonator with an oscillating volume. This is based on the fact that the frequency at which the resonator provides maximum damping can be controlled by oscillating its cavity volume. For this, two a...

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Main Authors: Zhao, Dan, Li, Junwei
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/96784
http://hdl.handle.net/10220/13059
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-967842020-03-07T13:19:24Z Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume Zhao, Dan Li, Junwei School of Mechanical and Aerospace Engineering A feedback control strategy is developed for mitigating combustion instabilities using a Helmholtz resonator with an oscillating volume. This is based on the fact that the frequency at which the resonator provides maximum damping can be controlled by oscillating its cavity volume. For this, two algorithms are developed. One is a real-time plane-wave decomposition algorithm; the other is a finite impulse response filter, its coefficients being optimized by the least-mean-square method but with a variable step size. The filter uses the decomposed incident wave to determine the optimum actuation signal. The performance of the control strategy, carried out with off-line system identification, is evaluated via a numerical model of an unstable combustion system with a dominant longitudinal mode. It is successfully demonstrated that the control strategy is more robust and capable of stabilizing the combustion system at a faster rate than that of conventional filters with fixed step size. 2013-08-06T06:12:07Z 2019-12-06T19:35:04Z 2013-08-06T06:12:07Z 2019-12-06T19:35:04Z 2012 2012 Journal Article Zhao, D.,& Li, J. (2012). Feedback Control of Combustion Instabilities Using a Helmholtz Resonator with an Oscillating Volume. Combustion Science and Technology, 184(5), 694-716. https://hdl.handle.net/10356/96784 http://hdl.handle.net/10220/13059 10.1080/00102202.2012.660224 en Combustion science and technology
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description A feedback control strategy is developed for mitigating combustion instabilities using a Helmholtz resonator with an oscillating volume. This is based on the fact that the frequency at which the resonator provides maximum damping can be controlled by oscillating its cavity volume. For this, two algorithms are developed. One is a real-time plane-wave decomposition algorithm; the other is a finite impulse response filter, its coefficients being optimized by the least-mean-square method but with a variable step size. The filter uses the decomposed incident wave to determine the optimum actuation signal. The performance of the control strategy, carried out with off-line system identification, is evaluated via a numerical model of an unstable combustion system with a dominant longitudinal mode. It is successfully demonstrated that the control strategy is more robust and capable of stabilizing the combustion system at a faster rate than that of conventional filters with fixed step size.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Zhao, Dan
Li, Junwei
format Article
author Zhao, Dan
Li, Junwei
spellingShingle Zhao, Dan
Li, Junwei
Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
author_sort Zhao, Dan
title Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
title_short Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
title_full Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
title_fullStr Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
title_full_unstemmed Feedback control of combustion instabilities using a Helmholtz resonator with an oscillating volume
title_sort feedback control of combustion instabilities using a helmholtz resonator with an oscillating volume
publishDate 2013
url https://hdl.handle.net/10356/96784
http://hdl.handle.net/10220/13059
_version_ 1681034540026429440