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Title:
THE EFFECTS OF THE AIR-FUEL VELOCITY RATIO ON TURBULENT NON-PREMIXED BLUFF-BODY FLAMES
Author: Yang, Tao; Zhang J(张健)
Issued Date: 2017
Conference Name: ASME Power Conference 2017
Conference Date: JUN 26-30, 2017
Conference Place: Charlotte, 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.
Keyword: LARGE-EDDY SIMULATION ; VARIABLE APPROACH ; DISC STABILIZER ; COMBUSTION ; JET ; MECHANISMS ; BURNER ; FLOW
Indexed Type: CPCI-S ; EI
Corresponding Author: Zhang, J (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Sponsorship: The 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.
Source: PROCEEDINGS OF THE ASME POWER CONFERENCE JOINT WITH ICOPE-17, 2017, VOL 1
Publisher: AMER SOC MECHANICAL ENGINEERS
Publish Place: NEW YORK
Language: 英语
WOS ID: WOS:000414877000032
ISBN: 978-0-7918-5760-1
Citation statistics:
Content Type: 会议论文
URI: http://dspace.imech.ac.cn/handle/311007/72179
Appears in Collections:非线性力学国家重点实验室_会议论文

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description.institution: 1.[Yang, Tao
2.Zhang, Jian] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China

Recommended Citation:
Yang, Tao,Zhang J. THE EFFECTS OF THE AIR-FUEL VELOCITY RATIO ON TURBULENT NON-PREMIXED BLUFF-BODY FLAMES[C]. 见:ASME Power Conference 2017. Charlotte, NC. JUN 26-30, 2017
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