IMECH-IR  > 非线性力学国家重点实验室
THE EFFECTS OF THE AIR-FUEL VELOCITY RATIO ON TURBULENT NON-PREMIXED BLUFF-BODY FLAMES
Yang T; Zhang J(张健); Zhang, J (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationPROCEEDINGS OF THE ASME POWER CONFERENCE JOINT WITH ICOPE-17, 2017, VOL 1
2017
Conference NameASME Power Conference 2017
Conference DateJUN 26-30, 2017
Conference PlaceCharlotte, NC
Abstract

We reported the large-eddy simulations of a series of bluff-body flames varying air-fuel velocity ratio. The air-fuel ratio y is defined by the ratio of external air velocity to central jet velocity, ranging from 0.05 to 0.50. The case of y =0.32 is exactly same the Sydney bluff-body HM1e flame. Firstly, the mathematical model and numerical method were validated in details as the simulation results are all in good agreement with measurements in HM1e flame. Then the interaction between turbulence and thermochemistry is revealed. As y increases, external coflow trends to dominant the flame behavior. The stoichiometric mixture fraction shifts from the area between recirculation zone and central jet to the area between external flow and recirculation zone. Corresponding, the flame changes from jet-like, columnar to hat-like flames. The different level of local extinction and reignition is also observed. Local extinction and reignition occurs in jet-like and columnar flames. As y increases, local extinction becomes easier and reignition becomes harder.

KeywordLarge-eddy Simulation Variable Approach Disc Stabilizer Combustion Jet Mechanisms Burner Flow
WOS IDWOS:000414877000032
Funding OrganizationThe investigations presented in this paper have been supported by National Natural Science Foundation of China under contract 51376190, 11572330, and 51306013. The authors also acknowledge National Supercomputer Centre in Tianjin for providing computational resource.
ISBN978-0-7918-5760-1
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72179
Collection非线性力学国家重点实验室
Corresponding AuthorZhang, J (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Affiliation[Yang, Tao,Zhang, Jian] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yang T,Zhang J,Zhang, J . THE EFFECTS OF THE AIR-FUEL VELOCITY RATIO ON TURBULENT NON-PREMIXED BLUFF-BODY FLAMES[C]. NEW YORK:AMER SOC MECHANICAL ENGINEERS,2017.
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