Experimental and numerical study on explosion behavior of hydrogen-air mixture in an obstructed closed chamber

被引：11
|
作者：
Jiang, Yuting [1 ]
Gao, Wei [1 ]
Sun, Zuo [2 ]
Liang, Bo [1 ]
Zhang, Kai [1 ]
Li, Yanchao [1 ]
机构：
[1] Dalian Univ Technol, Sch Chem Engn, 2 Linggong Rd, Dalian 116024, Peoples R China
[2] Chinese Inst Coal Sci, Emergency Sci Res Inst, Beijing 100013, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 49卷
关键词：
Flame evolution; Pressure dynamics; Obstacle distance; Blockage ratio; Flame -vortex interaction; PREMIXED FLAME PROPAGATION; ACOUSTIC INSTABILITY; OBSTACLE POSITION; COMBUSTION; ACCELERATION; OVERPRESSURE; METHANE/AIR; TURBULENCE; EVOLUTION; CHANNEL;
D O I：
10.1016/j.ijhydene.2023.08.159
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The flame evolution, flame front speed and pressure dynamics are investigated through experimental and simulation analysis. The effects of the obstacle on velocity vector field and vorticity field are analyzed. The results indicate that a rise in blockage ratio causes a rapid rise in flame front speed. The turbulent combustion, flame backflow, and overpressure are significantly enhanced as obstacle distance and blockage ratio increase. The jet flame results in a surge in flame front speed, and a momentary increase in pressure rise. The flame-vortex interaction causes strong turbulent combustion and a rapid overpressure increase. The overpressure displays regular periodic fluctuations and high-frequency oscillations with high amplitudes, which can be attributed to the dynamic and impulsive responses. The vortex results in the formation of a curled flame with high localized vorticity. The backflow flame, exhibiting an extremely high vorticity magnitude, is induced by the overall pressure gradient and flow field recirculation. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：1032 / 1045
页数：14
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