Experimental Investigation of the Flame Front Propagation Characteristic During Light-round Ignition in an Annular Combustor

Yifan Xia; Changhong Linghu; Yao Zheng; Chenran Ye; Chengbiao Ma; Haiwen Ge; Gaofeng Wang

doi:10.1007/s10494-019-00018-y

Experimental Investigation of the Flame Front Propagation Characteristic During Light-round Ignition in an Annular Combustor

Yifan Xia
, Changhong Linghu
, Yao Zheng
, Chenran Ye
, Chengbiao Ma
, Haiwen Ge
, Gaofeng Wang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

48 Citations (Scopus)

Abstract

The light-round process in a transparent annular combustor which comprises 16 swirling injectors injecting lean premixed propane/air mixtures is experimentally investigated. This annular combustor is derived from the ‘MICCA’ combustor, pioneered by EM2C laboratory (Bourgouin et al., Combust. Flame 160(8), 1398, 2013).The annular chamber is formed by two transparent concentric quartz tubes, which provides optical access to high-speed imaging to diagnose the chemiluminescence of flame fronts. Two ignition modes (i.e. two extreme conditions in scheduling fuel delivery and igniter sparking), controlled by ignition procedure are investigated, thus the FFSL (Fuel First, Spark Later) and the SFFL (Spark First, Fuel Later) modes. These two ignition modes exhibit different patterns of injector-toinjector flame propagation during the light-round process. The light-around time and mean circumferential flame propagation speed are obtained for various conditions. The influence of thermal expansion, velocity fluctuation and convection to the light-round process is investigated and compared for two ignition modes. © Springer Nature B.V. 2019.

Original language	English
Pages (from-to)	247-269
Journal	Flow, Turbulence and Combustion
Volume	103
Issue number	1
DOIs	https://doi.org/10.1007/s10494-019-00018-y
Publication status	Published - 1 Jun 2019
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

The study was funded by the National Natural Science Foundation of China, under Grant No. 91541108 and No. 91841302, and the Fundamental Research Funds for the Central Universities, under Grant No. 2017FZA4032.

Research Keywords

Annular combustor
Ignition dynamics
Light-round process
Swirling flame

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title = "Experimental Investigation of the Flame Front Propagation Characteristic During Light-round Ignition in an Annular Combustor",

abstract = "The light-round process in a transparent annular combustor which comprises 16 swirling injectors injecting lean premixed propane/air mixtures is experimentally investigated. This annular combustor is derived from the {\textquoteleft}MICCA{\textquoteright} combustor, pioneered by EM2C laboratory (Bourgouin et al., Combust. Flame 160(8), 1398, 2013).The annular chamber is formed by two transparent concentric quartz tubes, which provides optical access to high-speed imaging to diagnose the chemiluminescence of flame fronts. Two ignition modes (i.e. two extreme conditions in scheduling fuel delivery and igniter sparking), controlled by ignition procedure are investigated, thus the FFSL (Fuel First, Spark Later) and the SFFL (Spark First, Fuel Later) modes. These two ignition modes exhibit different patterns of injector-toinjector flame propagation during the light-round process. The light-around time and mean circumferential flame propagation speed are obtained for various conditions. The influence of thermal expansion, velocity fluctuation and convection to the light-round process is investigated and compared for two ignition modes. {\textcopyright} Springer Nature B.V. 2019.",

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AU - Ma, Chengbiao

AU - Ge, Haiwen

AU - Wang, Gaofeng

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - The light-round process in a transparent annular combustor which comprises 16 swirling injectors injecting lean premixed propane/air mixtures is experimentally investigated. This annular combustor is derived from the ‘MICCA’ combustor, pioneered by EM2C laboratory (Bourgouin et al., Combust. Flame 160(8), 1398, 2013).The annular chamber is formed by two transparent concentric quartz tubes, which provides optical access to high-speed imaging to diagnose the chemiluminescence of flame fronts. Two ignition modes (i.e. two extreme conditions in scheduling fuel delivery and igniter sparking), controlled by ignition procedure are investigated, thus the FFSL (Fuel First, Spark Later) and the SFFL (Spark First, Fuel Later) modes. These two ignition modes exhibit different patterns of injector-toinjector flame propagation during the light-round process. The light-around time and mean circumferential flame propagation speed are obtained for various conditions. The influence of thermal expansion, velocity fluctuation and convection to the light-round process is investigated and compared for two ignition modes. © Springer Nature B.V. 2019.

AB - The light-round process in a transparent annular combustor which comprises 16 swirling injectors injecting lean premixed propane/air mixtures is experimentally investigated. This annular combustor is derived from the ‘MICCA’ combustor, pioneered by EM2C laboratory (Bourgouin et al., Combust. Flame 160(8), 1398, 2013).The annular chamber is formed by two transparent concentric quartz tubes, which provides optical access to high-speed imaging to diagnose the chemiluminescence of flame fronts. Two ignition modes (i.e. two extreme conditions in scheduling fuel delivery and igniter sparking), controlled by ignition procedure are investigated, thus the FFSL (Fuel First, Spark Later) and the SFFL (Spark First, Fuel Later) modes. These two ignition modes exhibit different patterns of injector-toinjector flame propagation during the light-round process. The light-around time and mean circumferential flame propagation speed are obtained for various conditions. The influence of thermal expansion, velocity fluctuation and convection to the light-round process is investigated and compared for two ignition modes. © Springer Nature B.V. 2019.

KW - Annular combustor

KW - Ignition dynamics

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KW - Swirling flame

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DO - 10.1007/s10494-019-00018-y

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Experimental Investigation of the Flame Front Propagation Characteristic During Light-round Ignition in an Annular Combustor

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