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An Investigation of Alternative Aviation Fuel Spray Characteristics at Lean Blowout Conditions Using Hybrid Air-Blast Pressure Swirl Atomizer

机译：使用混合空气-高炉压力旋流雾化器的稀薄井喷条件下替代航空燃料喷雾特性的研究

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摘要

Many efforts on reducing pollutant emissions from the aviation gas turbines have been to mitigate the climate change and air quality. The National Jet Fuel Combustion Program (NJFCP) was initiated to develop new alternative aviation fuels, which are composed solely on hydrocarbons (non-petroleum), and to understand better the impact of chemical/physical properties of the fuels on combustion. One of the major objectives of NJFCP is to study the spray characteristics of the alternative jet fuels compared to conventional jet fuels to ensure that the performance of the alternative jet fuels is comparable to conventional jet fuels.;In this study, spray measurements for alternative jet fuels with Phase Doppler Anemometry are presented. The major objective of this work is to study spray characteristics such as droplet size, drop velocity, and spray cone angle for candidate alternative jet fuels for operating conditions corresponding to lean blowout (LBO). A hybrid air-blast pressure swirl atomizer from Parker-Hannifin Corporation is used in the experiments. The spray cone angles are investigated using shadowgraph imaging with a high speed camera. Six fuels selected by the NJFCP on the basis of chemistry are A-2, C-1, C-5, C-7, C-8, C-9. The droplet sizes and velocities are measured and compared among six fuels at LBO conditions. For spray cone angles, three fuels (A-2, C-1, and C-5) were investigated at LBO conditions.;The effects of the fuel injection pressure and the pressure drop across the injector swirler assembly on the spray characteristics have been studied. The droplet sizes and velocities were varied for each fuel. However, the differences were minimal among the fuels. The fuel injection pressure was observed to have minimal effect on the mean drop sizes and velocities, while the pressure drop across the swirler assembly had a significant effect on those characteristics. For spray cone angles, it was observed that the effects of the injection pressure, pressure drop, and fuel type were not significant.
机译：减少航空燃气轮机污染物排放的许多努力都是为了减轻气候变化和空气质量。启动了国家喷气燃料燃烧计划（NJFCP），以开发仅由碳氢化合物（非石油）组成的新型替代航空燃料，并更好地理解燃料的化学/物理性质对燃烧的影响。 NJFCP的主要目标之一是研究替代喷气燃料与常规喷气燃料相比的喷雾特性，以确保替代喷气燃料的性能可与常规喷气燃料媲美。在本研究中，替代喷气燃料的喷雾测量提出了具有相位多普勒风速仪的燃料。这项工作的主要目标是研究与稀薄喷出（LBO）相对应的候选替代喷气燃料的喷雾特性，例如液滴尺寸，液滴速度和喷雾锥角。实验中使用了Parker-Hannifin Corporation的混合式鼓风压力旋流雾化器。使用高速照相机的阴影图成像研究喷雾锥角。 NJFCP根据化学性质选择的六种燃料是A-2，C-1，C-5，C-7，C-8，C-9。在LBO条件下，测量并比较了六种燃料之间的液滴尺寸和速度。对于喷雾锥角，在LBO条件下研究了三种燃料（A-2，C-1和C-5）;燃料喷射压力和整个喷射器旋流器组件上的压降对喷雾特性的影响已得到研究。每种燃料的液滴大小和速度都不同。但是，这些燃料之间的差异很小。观察到燃料喷射压力对平均液滴尺寸和速度的影响最小，而整个旋流器组件上的压力下降对那些特性的影响很大。对于喷雾锥角，观察到喷射压力，压降和燃料类型的影响不明显。

著录项

  • 作者

    Shin, Dongyun.;

  • 作者单位

    Purdue University.;

  • 授予单位 Purdue University.;
  • 学科 Aerospace engineering.
  • 学位 M.S.A.A.
  • 年度 2017
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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