Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber

SU Hang; JIANG Liqiao; CAO Hailiang; LIU Qinfei; LI Yanqin; WANG Xiaohan; ZHAO Daiqing

doi:10.11883/bzycj-2016-0198

Volume 38 Issue 2

Jan. 2018

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SU Hang, JIANG Liqiao, CAO Hailiang, LIU Qinfei, LI Yanqin, WANG Xiaohan, ZHAO Daiqing. Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber[J]. Explosion And Shock Waves, 2018, 38(2): 381-389. doi: 10.11883/bzycj-2016-0198

Citation:

SU Hang, JIANG Liqiao, CAO Hailiang, LIU Qinfei, LI Yanqin, WANG Xiaohan, ZHAO Daiqing. Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber[J]. Explosion And Shock Waves, 2018, 38(2): 381-389. doi: 10.11883/bzycj-2016-0198

Citation:

SU Hang, JIANG Liqiao, CAO Hailiang, LIU Qinfei, LI Yanqin, WANG Xiaohan, ZHAO Daiqing. Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber[J]. Explosion And Shock Waves, 2018, 38(2): 381-389. doi: 10.11883/bzycj-2016-0198

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Characteristics of propane/air flame propagation and propane/hydrogen/air detonation in a micro chamber

doi: 10.11883/bzycj-2016-0198

SU Hang^{1, 2, 3, 4},
JIANG Liqiao^{1, 2, 3
,},
CAO Hailiang⁵,
LIU Qinfei^{1, 2, 3, 4},
LI Yanqin⁵,
WANG Xiaohan^{1, 2, 3},
ZHAO Daiqing^{1, 2, 3}

1.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
2.
CAS Key Laboratory of Renewable Energy, Guangzhou 510640, Guangdong, China
3.
Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China
5.
School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, China

Received Date: 2016-07-06
Rev Recd Date: 2017-03-23
Publish Date: 2018-03-25

Abstract

Abstract

An experimental study on the characteristics of propane/air and propane/hydrogen/air flame propagation, at ambient temperature and pressure, was carried out in a narrow-gapped micro-chamber shaped like a disk and 150 mm in diameter, which was ignited by a spark igniter; photographs of the flame propagation were obtained with a high-speed camera at a gap distance of 2.0, 2.5, 3.0 and 5.0 mm, respectively; and the flame was observed to be smooth, wrinkled, and broken. As the flame equivalence ratio increases or the height of the gap decreases, the flame wrinkles occur earlier. The flame speed in the micro-chamber was slightly lower than that in the conventional-scale chamber, and it gradually decreased as the flame radius increased. As the gap height decreased, the flame propagation speed increased at first and then decreased, reaching the maximum at the gap height of 3 mm in the micro-chamber. As the heat loss increased, the micro scale effects played an important role in reducing the flame speed and enhancing the flame instability. Addition of hydrogen raised the flame propagation speed, and led to the detonation observed in the micro-chamber at a gap width of 2.5 mm.
- microscale combustion,
- flame propagation,
- flame wrinkles,
- flame speed,
- detonation

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References(24)

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