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dc.contributor.authorWu, Gangen_US
dc.contributor.authorLu, Zhenglien_US
dc.contributor.authorPan, Weichenen_US
dc.contributor.authorGuan, Yihengen_US
dc.contributor.authorLi, Shihuaien_US
dc.contributor.authorJi, Chenzenen_US
dc.identifier.citationWu, G., Lu, Z., Pan, W., Guan, Y., Li, S. & Ji, C. (2019). Experimental demonstration of mitigating self-excited combustion oscillations using an electrical heater. Applied Energy, 239, 331-342.
dc.description.abstractThe present work considers mitigating combustion instability occurred in a conventional Rijke-type combustor and a Y-shaped one. For this, theoretical, numerical and experimental studies are conducted to shed lights on the role of applying a heater on suppressing flame-exited oscillations. Theoretical modal analysis shows that the heater acts like an acoustic absorber. Further 2D numerical investigations are conducted on a Rijke-type combustor, in which a propane-fuelled flame and heating bands with constant surface temperatures are implemented at upstream and downstream of the combustor. Limit cycle oscillations produced by the flame are found to be significantly suppressed, if the surface temperature of the heating bands is large enough. Experimental study is then performed on a Rijke tube, in which implementing a heater leads to the unstable combustion system being successfully stabilized. Further validation of the proposed control approach is performed by implementing the electrical heater in an upper branch of a Y-shaped combustor. A premixed propane-fuelled flame is enclosed in the bottom stem. When the heater is not actuated, self-excited thermoacoustic oscillations are generated at approximately 190 Hz. However, with the heater being actuated, sound pressure level is successfully reduced from 130 dB to 80 dB. The present work opens up an alternative but practical control approach to enable combustors being operated stably.en_US
dc.relation.ispartofApplied Energyen_US
dc.rights© 2019 Elsevier Ltd. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleExperimental demonstration of mitigating self-excited combustion oscillations using an electrical heateren_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.subject.keywordsCombustion Instabilityen_US
dc.description.acknowledgementThis work is financially supported by National Natural Science Foundation of China with Grant Nos. 51406017, 51206148, 51476145, 51476146, 51776188 and 51506079, Key Laboratory Open Research Subject of Vehicle Measurement, Control and Safety of Sichuan Province (szjj2016-080), Open Research Subject of State Key Laboratory of Engines, China (K2018-07); Key Laboratory Open Research Subject of Advanced Manufacture Technology for Automobile Parts (Grant No. 2017KLMT02, Chongqing University of Technology), Ministry of Education, China. It is gratefully acknowledged.en_US
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