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Soot, PAH and OH measurements in vaporized liquid fuel flames

机译:汽化液体燃料火焰中的烟尘,PAH和OH测量

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摘要

Qualitative measurements of both OH and polycyclic aromatic hydrocarbons (PAH) as well as quantitative data of soot volume fraction f_v have been obtained in vaporized liquid fuels, with the main goal of providing experimental data for combustion models and numerical mechanism validation. Measurements were carried out in a laminar coflow burner which was designed, built and integrated with an evaporation system, enabling the combustion of vaporized liquid fuels at pressures of up to 3.0 MPa to be studied. The fuels n-heptane and n-decane, referred to in the literature as being important surrogate fuels, were selected for measurements at atmospheric pressure that were carried out in the experimental setup described, making use of a combination of the Laser Induced Fluorescence (LIF) and Laser Induced Incandescence (LII) techniques. Partially premixed flames of n-heptane and n-decane showed similar combustion characteristics in the range of 1.9 < φ < 3.7. For both of the fuels the threshold for soot formation was found to be at about φ ~ 3.3. Comparison of the LIF and LII measurements for the n-heptane flames within the range of 3.7 ≤ φ ≤ 8.5 indicated the maximum PAH LIF signal to be a good predictor of f_(vmax) obtained from LII. Excitation at 266 nm using delayed detection was found to result in the signals obtained showing a close linear correlation with the soot volume fraction obtained from LII when prompt detection at 1064 nm excitation was used. Neither the effects of any additional photo-chemical processes making use of high laser power at 266 nm nor the effects of particle size on the delayed gate times appeared to be of any significance for the flame conditions studied here.
机译:已经获得了汽化液体燃料中的OH和多环芳烃(PAH)的定性测量值以及烟灰体积分数f_v的定量数据,其主要目的是为燃烧模型和数值机理验证提供实验数据。测量是在层流同流燃烧器中进行的,该燃烧器经设计,制造并与蒸发系统集成在一起,可以研究高达3.0 MPa的压力下蒸发的液体燃料的燃烧。选择了正庚烷和正癸烷燃料,在文献中被认为是重要的替代燃料,这些气体是在上述实验装置中采用激光诱导荧光(LIF)的组合进行选择的,用于在大气压下进行测量)和激光诱导白炽灯(LII)技术。正庚烷和正癸烷的部分预混火焰在1.9 <Φ<3.7的范围内显示出相似的燃烧特性。对于这两种燃料,碳烟形成的阈值都在φ〜3.3左右。在3.7≤φ8.5范围内对正庚烷火焰进行LIF和LII测量的比较表明,最大PAH LIF信号可以很好地预测从LII获得的f_(vmax)。发现使用延迟检测在266 nm处激发时,当使用1064 nm激发进行快速检测时,所获得的信号与从LII获得的烟volume体积分数显示出紧密的线性相关性。对于此处研究的火焰条件,使用266 nm的高激光功率进行任何其他光化学处理的影响,或对延迟的浇口时间的粒径影响均未显示出任何重要意义。

著录项

  • 来源
    《Fuel》 |2013年第10期|145-152|共8页
  • 作者单位

    Eindhoven University of Technology, Department of Mechanical Engineering, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden;

    Eindhoven University of Technology, Department of Mechanical Engineering, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;

    Eindhoven University of Technology, Department of Mechanical Engineering, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;

  • 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

    Soot; PAH; Laser induced fluorescence; Laser induced incandescence; Liquid fuel;

    机译:煤烟;PAH;激光诱导荧光;激光诱导的白炽灯;液体燃料;

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