CIESC Journal ›› 2018, Vol. 69 ›› Issue (5): 2199-2207.DOI: 10.11949/j.issn.0438-1157.20170960

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Ignition characteristics of methane/ethane and methane/propane mixed fuels

ZHANG Zunhua1,2, XU Li2, LIANG Junjie2, LI Jingrui2, LI Gesheng1,2   

  1. 1. Key Laboratory of High Performance Ship Technology(Wuhan University of Technology), Ministry of Education, Wuhan 430063, Hubei, China;
    2. School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, Hubei, China
  • Received:2017-07-25 Revised:2017-12-28 Online:2018-05-05 Published:2018-05-05
  • Supported by:

    supported by the National Key R&D Program of China (2016YFC0205600), the National Natural Science Foundation of China (51479149) and the Excellent Dissertation Cultivation Funds of Wuhan University of Technology (2016-YS-042).

甲烷/乙烷与甲烷/丙烷混合燃料着火特性

张尊华1,2, 徐力2, 梁俊杰2, 李敬瑞2, 李格升1,2   

  1. 1. 武汉理工大学高性能船舶技术教育部重点实验室, 湖北 武汉 430063;
    2. 武汉理工大学能源与动力工程学院, 湖北 武汉 430063
  • 通讯作者: 李格升
  • 基金资助:

    国家重点研发计划项目(2016YFC0205600);国家自然科学基金项目(51479149);武汉理工大学研究生优秀学位论文培育项目(2016-YS-042)。

Abstract:

The effects of the mixing of ethane and propane on the ignition delay time of methane were studied through the shock tube and CHEMKIN software.The cause of these effects was analyzed from the perspective of chemical kinetics. The results show that the addition of ethane and propane can shorten the delay time of methane ignition, but this influence becomes smaller along with the increase of temperature. The sensitivity analysis suggests that H + O2=O + OH (R1) promotes ignition most both for the mixture fuels of methane/ethane and methane/propane, and the two elementary reactions of CH4 + H=CH3 + H2 (R128) and CH4 + OH=CH3 + H2O (R129) exert maximum inhibition for the ignition of methane/ethane and methane/propane blends. It is found that the increase of the ratio of ethane and propane in the mixed fuels of methane/ethane and methane/propane has little influence on the main reaction path of methane, but mainly affects the consumption rate of CH3.

Key words: methane, blend, shock tube, ignition delay time, chemical kinetics

摘要:

利用激波管与CHEMKIN软件研究了不同初始条件下乙烷和丙烷的掺混对甲烷着火延迟时间的影响规律,并从化学动力学角度分析了掺混乙烷和丙烷对甲烷着火延迟时间造成影响的原因。实验与模拟研究表明乙烷和丙烷的掺混会造成甲烷着火延迟时间的大幅度缩短,但随着温度的升高,其对甲烷着火延迟时间的影响逐渐变小。通过敏感性分析发现无论是甲烷/乙烷混合燃料还是甲烷/丙烷混合燃料,对着火促进最大的基元反应都是H+O2=O+OH(R1),在甲烷/乙烷和甲烷/丙烷混合燃料的着火反应中对着火抑制最大的两个基元反应是CH4+H=CH3+H2(R128)和CH4+OH=CH3+H2O(R129)。通过路径分析发现在甲烷/乙烷与甲烷/丙烷混合燃料中,随着混合燃料中乙烷与丙烷比例的增加,甲烷的主要反应路径基本不发生变化,主要影响了CH3的消耗速率。

关键词: 甲烷, 混合, 激波管, 着火延迟时间, 化学动力学

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