Numerical simulation on flame propagation characteristics of premixed H2/Air in sudden expansion ducts

doi:10.16265/j.cnki.issn1003-3033.2019.07.006

Abstract

Abstract: To explore the characteristics of premixed Hydrogen/Air flame propagation in sudden expansion ducts, the flow structure, flame shape, flame speed and overpressure of flame through the ducts with various expansion angles β were numerically investigated by Flacs based on the k-ε model and the β-flame thickening model. Results shows that the premixed Hydrogen/Air flame undergoes stages of extinction and re-ignition in the sudden expansion ducts under various angles of β.The flame propagation distance in the ducts increased obviously with the angle β.Baroclinic effect can inhibit the intensity of the vortex in the flow field, and hence weaken the forward transport of fuel.This inhibit effects decrease with the expansion angle β.

Key words: sudden expansion duct, H₂ flame, flame propagation, baroclinic effect, vortex

CLC Number:

X928.7

ZHANG Ying, SONG Yuhan, JIANG Shuai, LI Yuntao, SHEN Shifei, CHEN Yue. Numerical simulation on flame propagation characteristics of premixed H₂/Air in sudden expansion ducts[J]. China Safety Science Journal, 2019, 29(7): 33-38.

References

[1] 程关兵, 王国大, 黄燕晓. 氢气爆燃转爆轰特性试验研究[J]. 中国安全科学学报, 2016,26(12): 64-68.
CHENG Guanbing,WANG Guoda,HUANG Yanxiao.Experimental study on characteristics of hydrogen deflagration to detonation transition[J].China Safety Science Journal,2016,26(12): 64-68.
[2] CLANET C, SEARBY G. On the "tulip flame" phenomenon [J]. Combustion & Flame, 1996, 105(1/2): 225-238.
[3] XIAO Huahua, HOUIM R W, ORAN E S. Formation and evolution of distorted tulip flames[J]. Combustion & Flame, 2015, 162(11): 4 084-4 101.
[4] ZHENG Kai, YU Minggao, LIANG Yunpei, et al. Large eddy simulation of premixed hydrogen/methane/air flame propagation in a closed duct[J]. International Journal of Hydrogen Energy, 2018, 43(7): 3 871-3 884.
[5] YU Minggao, YANG Xufeng, ZHENG Kai, et al. Experimental study of premixed syngas/air flame deflagration in a closed duct[J]. International Journal of Hydrogen Energy, 2018,43(29): 13 676-13 686.
[6] PAPELEXANDRIS M V, THOMAS J F, JACOBS C, et al. Structural characteristics of detonation expansion from a small channel to a larger one[J]. Proceedings of the Combustion Institute, 2007, 31(2): 2 407-2 414.
[7] JONES D A, KEMISTER G, TONELLO N A, et al. Numerical simulation of detonation reignition in H₂-O₂mixtures in area expansions[J]. Shock Waves, 2000, 10(1): 33-41.
[8] MIDDHA P, HANSEN O R. Predicting deflagration to detonation transition in hydrogen explosions[J]. Process Safety Progress, 2010, 27(3): 192-204.
[9] BLEYER A, TAVEAU J, DJEBAILI C, et al. Comparison between FLACS explosion simulations and experiments conducted in a PWR Steam Generator casemate scale down with hydrogen gradients[J]. Nuclear Engineering & Design, 2012, 245: 189-196.
[10] MOGI T, WADA Y, OGATA Y, et al. Self-ignition and flame propagation of high-pressure hydrogen jet during sudden discharge from a pipe[J]. International Journal of Hydrogen Energy, 2009, 34(14): 5 810-5 816.
[11] 范周琴. 超声速湍流燃烧火焰面模型判别建模及应用研究[D]. 长沙:国防科学技术大学, 2011.
FAN Zhouqin.Investigation of validation, modeling and application of flamelet model in supersonic turbulent combustion[D].Changsha: National University of Defense Technology,2011.
[12] PHILIPS P, JOEL D. Initiation and evolution of triple flames subject to thermal expansion and gravity[J].Proceedings of the Combustion Institute,2017,36(1): 1 431-1 437.
[13] JOHANSEN C, CICCARELLI G. Modeling the initial flame acceleration in an obstructed channel using large eddy simulation[J]. Journal of Loss Prevention in the Process Industries, 2013, 26(4): 571-585.
[14] 陈鹏, 李艳超, 黄福军. 管道内甲烷/空气层流火焰向湍流转捩的微观特性研究[J]. 工程热物理学报, 2016, 37(6): 1 354-1 361.
CHEN Peng,LI Yanchao,HUANG Fujun. Microscopic characteristics of transition from laminar to turbulent flame of premixed methane/air in the duct [J].Journal of Engineering Thermophysics,2016, 37(6): 1 354-1 361.

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Numerical simulation on flame propagation characteristics of premixed H₂/Air in sudden expansion ducts

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