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Article: Passive control of combustion instability through an acoustic valve

TitlePassive control of combustion instability through an acoustic valve
Authors
KeywordsAcoustic valve
Combustion instability
Passive control
Thermo-acoustic coupling
Issue Date2010
PublisherChina Aerospace Science and Technology Corporation (中国航天科工集团公司). The Journal's web site is located at http://tjjs.periodicals.net.cn/default.html
Citation
Tuijin Jishu/Journal Of Propulsion Technology, 2010, v. 31 n. 6, p. 701-709 How to Cite?
AbstractThermo-acoustic instability results in large amplitude oscillations in pressure and heat release. These are a potential hazard to both aero-engines and ground-based gas turbines, which operate in fuel-lean combustion. Unsteady heat release generates sound waves that can resonate with the unsteady flame dynamics. Active control can be used to suppress instability, but engineers invariably favour passive solutions with simple designs. One passive design technique involves the addition of helmholtz resonators to absorb the sound energy at a few chosen frequencies, but the resonance frequency can shift significantly with the engine working conditions. A semi-active tuning of resonator geometry may be necessary and that complicates the design. In this study, we investigate the effectiveness of an acoustic valve that relieves the sound pressure like a small opening and its performance is not strongly frequency dependent. The proposed valve may be constructed as a side-branch helmholtz resonator with flexible cavity walls that lets out part of the sound wave but not the fluid flow. Eigen-value solution demonstrates that the addition of such a valve alters the fundamental standing wave structure inside the combustion chamber, and unstable operation conditions may be eliminated for arbitrary linear flame properties provided that a valve of reasonable size can be established.
Persistent Identifierhttp://hdl.handle.net/10722/139398
ISSN
2015 SCImago Journal Rankings: 0.296
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, LXen_HK
dc.contributor.authorAimee, MSen_HK
dc.date.accessioned2011-09-23T05:49:08Z-
dc.date.available2011-09-23T05:49:08Z-
dc.date.issued2010en_HK
dc.identifier.citationTuijin Jishu/Journal Of Propulsion Technology, 2010, v. 31 n. 6, p. 701-709en_HK
dc.identifier.issn1001-4055en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139398-
dc.description.abstractThermo-acoustic instability results in large amplitude oscillations in pressure and heat release. These are a potential hazard to both aero-engines and ground-based gas turbines, which operate in fuel-lean combustion. Unsteady heat release generates sound waves that can resonate with the unsteady flame dynamics. Active control can be used to suppress instability, but engineers invariably favour passive solutions with simple designs. One passive design technique involves the addition of helmholtz resonators to absorb the sound energy at a few chosen frequencies, but the resonance frequency can shift significantly with the engine working conditions. A semi-active tuning of resonator geometry may be necessary and that complicates the design. In this study, we investigate the effectiveness of an acoustic valve that relieves the sound pressure like a small opening and its performance is not strongly frequency dependent. The proposed valve may be constructed as a side-branch helmholtz resonator with flexible cavity walls that lets out part of the sound wave but not the fluid flow. Eigen-value solution demonstrates that the addition of such a valve alters the fundamental standing wave structure inside the combustion chamber, and unstable operation conditions may be eliminated for arbitrary linear flame properties provided that a valve of reasonable size can be established.en_HK
dc.languageengen_US
dc.publisherChina Aerospace Science and Technology Corporation (中国航天科工集团公司). The Journal's web site is located at http://tjjs.periodicals.net.cn/default.htmlzh_HK
dc.relation.ispartofTuijin Jishu/Journal of Propulsion Technologyen_HK
dc.subjectAcoustic valveen_HK
dc.subjectCombustion instabilityen_HK
dc.subjectPassive controlen_HK
dc.subjectThermo-acoustic couplingen_HK
dc.titlePassive control of combustion instability through an acoustic valveen_HK
dc.typeArticleen_HK
dc.identifier.emailHuang, LX:lixi@hku.hken_HK
dc.identifier.authorityHuang, LX=rp00119en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-79952480787en_HK
dc.identifier.hkuros194967en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952480787&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume31en_HK
dc.identifier.issue6en_HK
dc.identifier.spage701en_HK
dc.identifier.epage709en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridHuang, LX=7404735514en_HK
dc.identifier.scopusauthoridAimee, MS=37015432800en_HK

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