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首页> 外文期刊>Combustion and Flame >Study on sooting behavior of premixed C-1-C-4 n-alkanes/air flames using a micro flow reactor with a controlled temperature profile
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Study on sooting behavior of premixed C-1-C-4 n-alkanes/air flames using a micro flow reactor with a controlled temperature profile

机译：使用可控温度曲线的微流反应器研究预混C-1-C-4正构烷烃/空气火焰的烟ot行为

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摘要

Sooting behavior of premixed C-1-C-4 n-alkanesiair mixtures at maximum temperatures lower than 1400 K is studied experimentally using a micro flow reactor with a controlled temperature profile. Flame and soot responses to equivalence ratio (1.5-4.0) are observed for all mixtures. Critical sooting equivalence ratio observed for methane, propane and n-butane is 1.8, whereas, for ethane it is 1.9. Sooting behavior at similar critical equivalence is further interpreted qualitatively by observing relative axial locations of upstream edges of sooting region, where relative downstream location indicates delayed soot formation. The order of axial location of upstream edge of soot at equivalence ratio 1.8 is: propane < n-butane < methane; and, the order at equivalence ratio 1.9 is: propane similar to n-butane similar to ethane < methane. Sooting region shifts upstream for ethane, propane and n-butane with increasing equivalence ratio. However, it does not change for methane with increasing equivalence ratio above 2.0. One dimensional computations with detailed chemistry are performed to study observed flame and soot responses. Ethane is found to be most reactive fuel due to coupling of H abstraction from fuel and H production in the flame. Computed flame positions vary widely among mechanisms for methane. Most exothermic reaction at flame is CH3+CH3=C2H6 for all mechanisms and for all the fuels. Computations using KAUST mechanism are performed for all the fuels at various equivalence ratios in the range 1.35-4.0 to discuss overall sooting behavior. Maximum computed pyrene mole fractions are used to study relative sooting behavior qualitatively as they correlate well with soot. The trends of maximum computed pyrene mole fractions qualitatively explain observed trends of critical sooting equivalence ratios and overall sooting behavior of fuels in the current experiments. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：使用具有可控温度曲线的微流反应器，通过实验研究了预混合的C-1-C-4正构烷烃混合物在最高温度低于1400 K时的烟ot行为。对于所有混合物，观察到火焰和烟灰对当量比（1.5-4.0）的响应。甲烷，丙烷和正丁烷的临界烟当量比为1.8，而乙烷为1.9。通过观察烟ot区域上游边缘的相对轴向位置，从质量上进一步解释了在类似临界当量下的烟ot行为，其中相对下游位置表示烟灰形成延迟。当量比为1.8时，烟灰上游边缘的轴向位置顺序为：丙烷<正丁烷<甲烷;且当量比为1.9时的顺序是：丙烷类似于正丁烷，类似于乙烷<甲烷。随着等当比的增加，碳烟区域向乙烷，丙烷和正丁烷的上游移动。但是，当甲烷当量比增加到2.0以上时，甲烷不会改变。用详细的化学方法进行一维计算，以研究观察到的火焰和烟尘响应。由于从燃料中提取H和火焰中的H产生耦合，发现乙烷是最活泼的燃料。在甲烷生成机理之间，计算出的火焰位置差异很大。对于所有机理和所有燃料，火焰中最放热的反应是CH3 + CH3 = C2H6。对于所有燃料，在1.35-4.0范围内的各种当量比下，都使用KAUST机制进行计算，以讨论整体的烟ing行为。使用最大计算pyr摩尔分数定性研究相对烟so行为，因为它们与烟ot相关性很好。最大计算explain摩尔分数的趋势定性地解释了在当前实验中观察到的临界烟ot当量比和燃料总体烟behavior行为的趋势。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

著录项

  • 来源
    《Combustion and Flame》 |2016年第12期|100-110|共11页
  • 作者

    Dubey Ajit Kumar; Tezuka Takuya; Hasegawa Susumu; Nakamura Hisashi; Maruta Kaoru;

  • 作者单位

    Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan;

    Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan;

    Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan;

    Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan;

    Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan|Far Eastern Fed Univ, Int Combust Energy Lab, Vladivostok, Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sooting behavior; Methane; Ethane; Propane; n-butane; Micro flow reactor;

    机译：吹灰行为甲烷乙烷丙烷正丁烷微流反应器;

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