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Turbulent burning rates of gasoline components, Part 1-Effect of fuel structure of C-6 hydrocarbons

机译：汽油组分的湍流燃烧率，第1部分，C-6碳氢化合物燃料结构的影响

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摘要

Measurements of laminar and turbulent burning velocities have been made for premixed hydrocarbonair flames with six carbon atoms including unsaturated, branched and cyclic molecules. The seven different fuels studied were n-hexane, 1-hexene, 1-hexyne, 2,2 dimethyl butane, 2 methyl pentane (isohexane), cyclohexane and cyclohexene. The tests were performed in a constant volume, optically accessed spherical bomb, with the use of the schlieren technique and a high-speed camera. The deflagrations were initiated at elevated pressure and temperature of 0.5 MPa and 360 K, where burning velocity data is relatively sparse, under laminar and turbulent conditions with rms turbulent velocities of 2 and 6 m/s and for equivalence ratios of 0.78-1.67. The primary objective of this work was to compare the turbulent burn rates of the different fuel-air mixtures; the laminar burning velocities were used to interpret the turbulent data. The ranking of the laminar burning velocity was overall found to be 1-hexyne > cyclohexene > 1-hexene > cyclohexane > n-hexane > 2-methyl pentane > 2,2 dimethyl butane for the range of equivalence ratios tested. The ranking was found to be the same for the turbulent burn rate measurements, particularly so for the slowest and fastest fuels. As the rms turbulent velocity increased the relative differences between the fuels were found to generally increase for lean mixtures, remain similar around stoichiometric equivalence ratio and decrease for rich mixtures. This behaviour was linked to the sensitivity of turbulent flames to stretch and thermo-diffusive stability. (C) 2015 Elsevier Ltd. All rights reserved.
机译：对于具有六个碳原子的预混烃空气火焰，包括不饱和，支链和环状分子，已经进行了层流和湍流燃烧速度的测量。研究的七种不同燃料为正己烷，1-己烯，1-己炔，2,2-二甲基丁烷，2-甲基戊烷（异己烷），环己烷和环己烯。使用schlieren技术和高速相机，在恒定体积，光学访问的球形炸弹中进行测试。爆燃是在层流和湍流条件下，均方根湍流速度为2和6 m / s，当量比为0.78-1.67的情况下，在0.5 MPa的高温和360 K的高压和高温下开始爆燃。这项工作的主要目的是比较不同燃料-空气混合物的湍流燃烧率。层流燃烧速度被用来解释湍流数据。在所测试的当量比范围内，总体上发现层燃烧速度的等级为1-己炔>环己烯> 1-己烯>环己烷>正己烷> 2-甲基戊烷> 2，2-二甲基丁烷。发现湍流燃烧率测量的排名是相同的，特别是对于最慢和最快的燃料而言。随着均方根湍流速度的增加，对于稀薄混合物，燃料之间的相对差异通常会增加，在化学计量当量比附近保持相似，而对于浓混合物则降低。这种行为与湍流火焰对拉伸和热扩散稳定性的敏感性有关。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2016年第1期|347-356|共10页
  • 作者

    Burluka A. A.; Gaughan R. G.; Griffiths J. F.; Mandilas C.; Sheppard C. G. W.; Woolley R.;

  • 作者单位

    Univ Leeds, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England;

    ExxonMobil Res & Engn Co, Paulsboro Tech Ctr, Paulsboro, NJ 08066 USA;

    Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England;

    Univ Leeds, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England;

    Univ Leeds, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England;

    Univ Sheffield, Dept Mech Engn, Sheffield S1 3JD, S Yorkshire, England;

  • 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

    Laminar flames; Turbulent flames; Burning velocity; Hydrocarbon combustion;

    机译：层流火焰;湍流火焰;燃烧速度;烃类燃烧;

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