...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Temperature dependence of the fuel mixing effect on soot precursor formation in ethylene-based diffusion flames
【24h】

Temperature dependence of the fuel mixing effect on soot precursor formation in ethylene-based diffusion flames

机译：燃料混合效应对基于乙烯扩散火焰烟灰前体形成的温度依赖性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Soot formation is a complex process and can be affected by a variety of factors including base fuel type, fuel mixing, temperature and pressure. Under real-world conditions, these factors can interact with each other to influence soot formation jointly. The present work aims to provide an understanding on the temperature dependence of the fuel mixing effect on the formation of molecular soot precursors. In particular, the effects of propane and methane addition on aromatic formation in ethylene counterflow diffusion flames were studied experimentally by gas chromatography measurements and computationally utilizing a detailed chemical reaction mechanism. Two series of flames under high (with peak flame temperature similar to 2020 K) and low temperature conditions (similar to 1660 K) were covered to investigate the fuel mixing effects and its interaction with flame temperature. The experimental results clearly demonstrated the temperature-dependence of propane's mixing effects on benzene formation: Compared to the ethylene baseline flame a notable enhancement of benzene formation was observed with propane addition in the high temperature flames; while a reduction of benzene concentration was seen under low temperature conditions. For the methane mixing cases, the addition of methane decreased benzene formation in both the high and low temperature flames, with the effect being more pronounced under low temperature conditions. Numerical simulations of the tested flames were also conducted with a previously developed reaction mechanism (Wang et al, Combust. Flame, 160 (2013) 1667-1676). Through a detailed reaction pathway analysis based on the numerical data, it was found the addition of C3H8 and CH4 would inhibit the C-4 + C-2 but enhance the C-3 + C-3 benzene formation pathway. However, the relative importance of the two pathways to total benzene production rate was strongly dependent on flame temperature. This fact was identified to be the primary mechanism leading to the temperature dependence of the C3H8/CH4 mixing effect. The qualitatively different effect of C3H8 and CH4 addition on benzene formation in the high temperature flame was believed to originate from their different influences on CH3 and C3H3 radical concentrations. The present work highlighted the fact that the effects of fuel mixing on benzene formation can be highly dependent on flame thermal conditions. As a result, great care is needed when generalizing literature data of fuel doping effect on aromatic and sooting tendencies.
机译：烟灰形成是一种复杂的过程，可以受到各种因素的影响，包括基础燃料型，燃料混合，温度和压力。在真实世界的条件下，这些因素可以互相互动以共同影响烟灰形成。本作者旨在了解燃料混合效应对分子烟灰前体形成的温度依赖性的理解。特别地，通过气相色谱测量实验研究丙烷和甲烷加入对乙烯反流扩散火焰在乙烯反流扩散火焰中的影响，并使用详细的化学反应机制计算。覆盖高温下（具有类似于2020 k的峰值温度）和低温条件（类似于1660 k）的两种火焰，探讨燃料混合效果及其与火焰温度的相互作用。实验结果清楚地证明了丙烷对苯形成的混合效应的温度依赖性：与乙烯基线火焰相比，观察到高温火焰中的丙烷加成观察苯形成的显着提高;在低温条件下可以看到苯浓度的降低。对于甲烷混合案例，在高温和低温火焰中加入甲烷在高温和低温的情况下，效果在低温条件下更明显。测试火焰的数值模拟也用先前发育的反应机制进行（Wang等，燃烧。火焰，160（2013）1667-1676）。通过基于数值数据的详细反应途径分析，发现添加C3H8和CH4将抑制C-4 + C-2，但增强C-3 + C-3苯形成途径。然而，两种途径对总苯生产率的相对重要性强烈依赖于火焰温度。该事实被认为是导致C3H8 / CH4混合效应的温度依赖性的主要机制。认为C3H8和CH 4对高温火焰中苯形成的定性不同的效果源自它们对CH3和C3H3自由基浓度的不同影响。目前的工作强调了燃料混合对苯形成的影响可以高度依赖于火焰热条件。因此，当概括对芳香和烟灰倾向的燃料掺杂效果的文献数据概括的文献数据时需要很好的小心。

著录项

  • 来源
    《Fuel》 |2020年第may1期|117121.1-117121.14|共14页
  • 作者

    Wang Wei; Xu Lei; Yan Jin; Wang Yu;

  • 作者单位

    Wuhan Univ Technol Sch Automot Engn Hubei Key Lab Adv Technol Automot Components Wuhan 430070 Peoples R China;

    Wuhan Univ Technol Sch Automot Engn Hubei Key Lab Adv Technol Automot Components Wuhan 430070 Peoples R China;

    Univ N Carolina Dept Chem Chapel Hill NC 27514 USA;

    Wuhan Univ Technol Sch Automot Engn Hubei Key Lab Adv Technol Automot Components Wuhan 430070 Peoples R China|Hubei Collaborat Innovat Ctr Automot Components T Wuhan 430070 Peoples R China;

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

    Fuel mixing; Temperature dependence; Benzene formation; Gas chromatography; Diffusion flames;

    机译：燃料混合;温度依赖性;苯形成;气相色谱;扩散火焰;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号