微小空间内丙烷/空气火焰传播特性与加氢爆燃实验

苏航; 蒋利桥; 曹海亮; 刘秦飞; 李言钦; 汪小憨; 赵黛青

doi:10.11883/bzycj-2016-0198

微小空间内丙烷/空气火焰传播特性与加氢爆燃实验

doi: 10.11883/bzycj-2016-0198

苏航^{1, 2, 3, 4},
蒋利桥^{1, 2, 3,},
曹海亮⁵,
刘秦飞^{1, 2, 3, 4},
李言钦⁵,
汪小憨^{1, 2, 3},
赵黛青^{1, 2, 3}

1.
中国科学院广州能源研究所，广东广州 510640
2.
中国科学院可再生能源重点实验室，广东广州 510640
3.
广东省新能源和可再生能源研究开发与应用重点实验室，广东广州 510640
4.
中国科学院大学，北京 100049
5.
郑州大学，河南郑州 450001

基金项目:

国家重点基础研究发展计划项目 2014CB239600

国家自然科学基金项目 51336010

国家自然科学基金项目 51176174

广东省科技计划项目 2016A040403095

广东省科技计划项目 2014A050503054

详细信息

作者简介:
苏航(1991—)，男，博士研究生

中图分类号: O389
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- 被引次数: 0
出版历程
- 收稿日期: 2016-07-06
- 修回日期: 2017-03-23
- 刊出日期: 2018-03-25

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

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

摘要

摘要: 在内径150 mm的圆盘狭缝微型燃烧室内，实验探讨了在常温常压下，不同当量比的丙烷/空气预混气以及掺氢的丙烷/空气混合气在电火花点火后向外传播的特性，通过高速摄影方法获得了在狭缝间距为2.0、2.5、3.0、5.0 mm时微燃烧室内的火焰传播形态。实验中观察到火焰传播存在光滑、皱褶和断裂三种火焰锋面形态。当量比的增加和狭缝间距的减小会使火焰更容易发生褶皱。随着火焰的传播，火焰半径逐渐增大，火焰传播速度整体呈下降趋势。火焰传播速度随着间距的减小先增大后减小，在间距3 mm时最大。因为壁面散热的影响，微尺度效应在降低火焰传播速度和增加火焰不稳定性方面具有重要作用。掺入氢气能提高预混气的火焰传播速度，在间距2.5 mm的微燃烧腔中还观察到了爆燃现象。
- 微尺度燃烧 /
- 火焰传播 /
- 火焰皱褶 /
- 传播速度 /
- 爆燃
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

HTML全文

图 1 圆盘狭缝微尺度燃烧室及其结构尺寸

Figure 1. Micro-scale chamber with its structure and size

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图 2 实验系统示意图

Figure 2. Schematic graph of test rig

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图 3 处理火焰图片过程

Figure 3. Processing of flame propagation photo

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图 4 当量比为1.10时丙烷空气预混气的火焰传播形态演变

Figure 4. Flame shape evolution during its propagation of propane/air mixture (φ=1.10)

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图 5 不同当量比下丙烷/空气火焰传播特性(燃烧室间距H=2.0 mm)

Figure 5. Flame propagation of propane/air flame in micro-scale chamber (H=2.0 mm)

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图 6 不同当量比下火焰传播半径随时间变化(H=2.0 mm)

Figure 6. Flame radius varying with time at different equivalence ratios (H=2.0 mm)

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图 7 不同当量比下火焰传播速度特性(H=2.0 mm)

Figure 7. Flame propagation speed varying with radius at different equivalence ratios (H=2.0 mm)

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图 8 不同间距下的丙烷/空气预混火焰传播可燃极限当量比范围

Figure 8. Flammable equivalence ratio limits of propane/air flame propagation in different gaps

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图 9 不同间距下丙烷/空气火焰传播形态(φ=1.20)

Figure 9. Shapes of propane/air flame propagation in different gaps (φ=1.20)

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图 10 不同间距下的丙烷/空气火焰传播速度特性(φ=1.20)

Figure 10. Flame propagation speed of propane/air in different gaps (φ=1.20)

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图 11 当量比为1.00时丙烷/空气掺入氢气火焰传播特性

Figure 11. Shapes of flame propagation of C₃H₈/H₂/air mixture (φ=1.00)

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图 12 不同掺氢比下丙烷/空气火焰传播速度特性(φ=1.00)

Figure 12. Flame propagation speed of C₃H₈/H₂/air mixture (φ=1.00)

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