Flame propagation of C2-C4 hydrocarbons/air mixture in a constant-volume micro-chamber

doi:10.11949/j.issn.0438-1157.20160548

CIESC Journal ›› 2016, Vol. 67 ›› Issue (11): 4574-4579.DOI: 10.11949/j.issn.0438-1157.20160548

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Flame propagation of C₂-C₄ hydrocarbons/air mixture in a constant-volume micro-chamber

SU Hang^1,2, JIANG Liqiao¹, CAO Hailiang², LIU Qinfei¹, LI Yanqin², ZHAO Daiqing¹

1 Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
2 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, China

Received:2016-04-26 Revised:2016-08-15 Online:2016-11-05 Published:2016-11-05
Supported by:
supported by the National Basic Research Program of China(2014CB239600), the National Natural Science Foundation of China (51336010, 51176174) and the Science and Technology Project of Guangdong Province(2016A040403095).

微型定容燃烧腔内C₂~C₄烷烃/空气火焰传播

苏航^1,2, 蒋利桥¹, 曹海亮², 刘秦飞¹, 李言钦², 赵黛青¹

1 中国科学院广州能源研究所, 广东广州 510640;
2 郑州大学化工与能源学院, 河南郑州 450001

通讯作者: 蒋利桥,jianglq@ms.giec.ac.cn
基金资助:
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（51336010，51176174）；广东省科技计划项目（2016A040403095）。

Abstract

Abstract:

At ambient temperature and pressure condition, the outwardly propagating characteristics of quiescent ethane/air, propane/air and n-butane/air flames were experimentally investigated in a visible constant-volume micro-chamber with 35 mm diameter and 2 mm height respectively. The results showed that the flammable equivalence ratio ranges of these three fuels were different in the micro chamber. The sequence of them was ethane >propane >n-butane. Both smooth flame-front and wrinkled flame-front shapes were observed during flame propagating of these fuels. The flame speed was lower in the micro chamber than that in conventional combustion chamber, and the flame speed declined along the radial direction during flame propagating. With the increase of equivalence ratio, the flame-front was prone to appear wrinkles and crack. In addition, at high flammable equivalence ratio, sometimes, the flame propagation had a brief stagnation.

Key words: micro combustion, constant-volume combustion, flame propagation, flame wrinkles, flame speed

摘要：

在直径35 mm、高度2 mm光学可视的定容燃烧腔内，实验研究了常温常压静止乙烷/空气、丙烷/空气和正丁烷/空气预混气在燃烧腔中心由电火花点燃后向外传播的火焰传播特性。结果表明：3种燃料空气混合气可形成火焰传播的当量比范围不同，范围由大到小排序为乙烷>丙烷>正丁烷；3种燃料均存在由光滑火焰面向褶皱火焰面转变的传播形态；在微型定容燃烧腔内，3种燃料的火焰传播速度均低于常规尺度下定容燃烧弹内火焰传播速度，且火焰传播速度随半径增加而减小；随着当量比增加，火焰锋面容易出现褶皱和断裂现象，在高当量比情况下，火焰传播会出现短暂停滞。

关键词: 微尺度燃烧, 定容燃烧, 火焰传播, 火焰褶皱, 传播速度

CLC Number:

TQ028.8

SU Hang, JIANG Liqiao, CAO Hailiang, LIU Qinfei, LI Yanqin, ZHAO Daiqing. Flame propagation of C₂-C₄ hydrocarbons/air mixture in a constant-volume micro-chamber[J]. CIESC Journal, 2016, 67(11): 4574-4579.

苏航, 蒋利桥, 曹海亮, 刘秦飞, 李言钦, 赵黛青. 微型定容燃烧腔内C₂~C₄烷烃/空气火焰传播[J]. 化工学报, 2016, 67(11): 4574-4579.

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Flame propagation of C₂-C₄ hydrocarbons/air mixture in a constant-volume micro-chamber

微型定容燃烧腔内C₂~C₄烷烃/空气火焰传播

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