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首页> 外文期刊>Applied optics >PLANAR LASER-INDUCED-FLUORESCENCE IMAGING MEASUREMENTS OF OH AND HYDROCARBON FUEL FRAGMENTS IN HIGH-PRESSURE SPRAY-FLAME COMBUSTION
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PLANAR LASER-INDUCED-FLUORESCENCE IMAGING MEASUREMENTS OF OH AND HYDROCARBON FUEL FRAGMENTS IN HIGH-PRESSURE SPRAY-FLAME COMBUSTION

机译：高压喷雾火焰燃烧中OH和碳氢燃料碎片的平面激光诱导荧光成像测量

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Planar laser-induced fluorescence images of OH have been obtained in liquid-fueled spray flames burning heptane, ethanol, and methanol over a range of pressures from 0.1 to 1.0 MPa. In addition to the OH fluorescence, a nonresonant fluorescence interference that increased rapidly with pressure was detected. Examination of the spectrum of this interference indicates that it arises from hydrocarbon fuel-fragment species in the fuel-rich zones of the flame. The pressure dependence of the fluorescence signal is examined in both steady-state and time-dependent analyses, and a model for evaluation of pressure effects and quenching variations in quantitative imaging measurements in nonpremixed flame environments is presented. The results indicate that increased combustor pressure results in a rapid rise of the volume fraction of hydrocarbon fragments and a decrease in the OH volume fraction. [References: 40]
机译：在0.1至1.0 MPa的压力范围内，在燃烧庚烷，乙醇和甲醇的液体燃料喷雾火焰中获得了平面激光诱导的OH荧光图像。除OH荧光外，还检测到随压力迅速增加的非共振荧光干扰。对这种干扰的频谱进行检查表明，它是由火焰富油区中的碳氢化合物燃料碎片产生的。在稳态和时间相关分析中都检查了荧光信号的压力依赖性，并提出了一个模型用于评估非预混火焰环境中定量成像测量中的压力效应和猝灭变化。结果表明，燃烧器压力的增加导致烃碎片的体积分数的快速增加和OH体积分数的减小。 [参考：40]

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