IMECH-IR  > 非线性力学国家重点实验室
BLUFF-BODY FLAMES IN HOT AND DILUTED ENVIRONMENTS
Liu CY.; Zhang J(张健); Yang T.; Ma YH.
Source PublicationPROCEEDINGS OF THE ASME POWER CONFERENCE, 2018, VOL 1
2018
PagesUNSP V001T01A002
Conference NameASME Power Conference 2018 (POWER2018)
Conference DateJUN 24-28, 2018
Conference PlaceLake Buena Vista, FL
AbstractLarge eddy simulation/Flamelet progress variable approach is employed in current research to investigate how flame behaviour is influenced by bluff-body and coflow composition. We used Sydney bluff-body burner as the target burner. Computation grid in cylinder coordinates is approximately 2.7 million in total number, extended to the downstream location 80 times of jet diameter. Three coflow compositions with different oxygen ratio at the same inlet velocity are considered. Comparing to jet flames with hot and diluted coflow, instantaneous and statistical results showed that an introduction of bluff body preheats the fuel and shortens the flame length. At lower oxygen ratio condition, a weaker reaction zone emerged, marked by lower temperature and OH concentration; the flame appeared lifted gradually, leading to a potential MILD combustion. Besides, bluff-body effect behaves differently in these flames: at lower oxygen ratio condition, a large-scale distribution of CH2O appeared as a marker of partial premixing and preignition reaction in recirculation area; on the contrary, in higher oxygen ratio case, the recirculation area brings out more reactive fuel at lower speed and higher temperature, hence ignitable in the vicinity of bluff-body.
WOS IDWOS:000456357300002
Funding OrganizationNational Natural Science Foundation of China [51376190, 11572330]
ISBN978-0-7918-5139-5
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78568
Collection非线性力学国家重点实验室
Affiliation1.{Liu, Chengyu、Zhang, Jian、Yang, Tao} Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
2.{Ma, Yanhong} Beihang Univ, Sch Energy & Power Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu CY.,Zhang J,Yang T.,et al. BLUFF-BODY FLAMES IN HOT AND DILUTED ENVIRONMENTS[C],2018:UNSP V001T01A002.
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