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首页> 外文期刊>Combustion and Flame >Flame-temperature, light-attenuation, and CO measurements by spontaneous Raman scattering in non-sooting diesel-like jets
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Flame-temperature, light-attenuation, and CO measurements by spontaneous Raman scattering in non-sooting diesel-like jets

机译：火焰温度，光衰减和通过非拉动类柴油喷射中的自发拉曼散射进行的CO测量

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摘要

Quantitative spatially resolved measurements of temperature and species are lacking particularly in the core of combusting diesel jets. Major problems are light attenuation and interfering light emissions. However, these factors are reduced in non-sooting diesel-like jets, as demonstrated in the present work, because light is not attenuated by soot and interfering LIF (laser-induced fluorescence) from PAHs (poly cyclic aromatic hydrocarbons) is substantially lower. The current results show that thermometry by SRS (spontaneous Raman scattering) excited by a UV (ultraviolet) laser is therefore feasible even in the core of a non-sooting diesel-like jet in a combustion vessel. Two diagnostic approaches are assessed. The first one is based on the spectral band shape of the Stokes (red-shifted) ro-vibrational SRS from N-2, whereas the ratio of "integrated ro-vibrational Stokes to anti-Stokes (blue-shifted) N-2-SRS bands is exploited in the second one. It turns out that the first method is advantageous in terms of light attenuation by molecular species, the influence of interfering emissions, and resulting single-shot capability. However, these investigations also show that the anti-Stokes N-2-SRS signal can be used for quantification of light attenuation. This is particularly attractive because this SRS band at similar to 235 nm nearly coincides with a LIF emission from NO at similar to 237 nm, leading to improved attenuation correction of NO-LIE Furthermore, the recorded spectra indicate that additional quantitative species measurements by SRS are feasible in the non-sooting jet. For instance, the mole fraction of CO is quantified in this work for the first time in the jet core. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：缺乏对温度和物质的空间分辨定量测量，尤其是在燃烧柴油喷气机的核心中。主要问题是光衰减和干扰光发射。但是，如本工作所示，这些因素在非吸气式柴油机中得到了降低，因为光不会被烟灰衰减，并且来自PAH（多环芳烃）的LIF（激光诱导的荧光）的干扰也将大大降低。当前的结果表明，即使在燃烧容器中的非抽吸类柴油机射流的芯中，由UV（紫外线）激光激发的SRS（自发拉曼散射）测温法也是可行的。评估了两种诊断方法。第一个是基于N-2的斯托克斯（红移）旋转振动SRS的谱带形状，而“积分的斯托克斯旋转斯托克斯与反斯托克斯（蓝移）N-2-”之比在第二种方法中使用了SRS波段，结果表明第一种方法在分子种类的光衰减，干扰发射的影响以及由此产生的单发能力方面具有优势。斯托克斯N-2-SRS信号可用于光衰减的量化，因为在235 nm附近的该SRS波段与在237 nm附近的NO发出的LIF发射几乎重合，这特别吸引人，从而改善了NO的衰减校正-LIE此外，记录的光谱表明，通过SRS进行的其他定量物种测量在非-射流中是可行的，例如，这项工作首次在射流芯中对CO的摩尔分数进行了定量（C）2016 Combus研究所。由Elsevier Inc.出版。保留所有权利。

著录项

  • 来源
    《Combustion and Flame》 |2017年第2期|104-116|共13页
  • 作者

    Raffius Thomas; Schulz Christian; Ottenwaelder Tamara; Gruenefeld Gerd; Koss Hans-Juergen; Brands Thorsten; Pischinger Stefan;

  • 作者单位

    Rhein Westfal TH Aachen, Inst Tech Thermodynam, Schinkelstr 8, D-52062 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Tech Thermodynam, Schinkelstr 8, D-52062 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Combust Engines, Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Tech Thermodynam, Schinkelstr 8, D-52062 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Tech Thermodynam, Schinkelstr 8, D-52062 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Tech Thermodynam, Schinkelstr 8, D-52062 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Combust Engines, Aachen, Germany;

  • 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

    Diesel; Temperature; Raman; Attenuation; CO; Fuel/air ratio;

    机译：柴油;温度;拉曼;衰减;CO;燃油/空气比;

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