IMAGING OF VAPOR/LIQUID DISTRIBUTIONS OF SPLIT-INJECTED DIESEL SPRAYS IN A TWO-DIMENSIONAL MODEL COMBUSTION CHAMBER
IMAGING OF VAPOR/LIQUID DISTRIBUTIONS OF SPLIT-INJECTED DIESEL SPRAYS IN A TWO-DIMENSIONAL MODEL COMBUSTION CHAMBER
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DOI：
10.1080/00102200490473675
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发表时间：
2004-09
影响因子：
1.9
通讯作者：
Yuyin Zhang;K. Nishida
中科院分区：
文献类型：
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作者：
Yuyin Zhang;K. Nishida
紫外可见激光吸收散射（LAS）技术已扩展到非轴对称蒸发柴油喷雾中二维蒸汽/液体质量分布的同步成像，例如注入直喷柴油机二维模型燃烧室的喷雾。蒸气测量的主要误差是由测试燃料的摩尔吸收系数 (TDMAC) 的温度依赖性引起的。因此，选择TDMAC可以忽略不计的测试燃料可以大大提高测量精度。通过这种扩展的 LAS 技术，获得了总质量以及垂直于激光束的每个投影面积上气相和液相的质量分布，然后观察了高温高压定容容器中二维模型燃烧室中分流喷射柴油喷雾的行为。最后，研究了喷射质量比对蒸气和液滴分布以及燃料/空气混合特性的影响。
The ultraviolet-visible laser absorption-scattering (LAS) technique was extended to simultaneous imaging of two-dimensional vapor/liquid mass distributions in a nonaxisymmetric evaporating diesel spray such as that injected into a two-dimensional model combustion chamber of direct-injection diesel engines. The main error for vapor measurement is incurred by the temperature dependence of molar absorption coefficients (TDMAC) of the test fuel. Thus, selecting a test fuel of negligible TDMAC can greatly increase the measurement accuracy. By means of this extended LAS technique, the overall mass, as well as the mass distribution of vapor and liquid phase per projection area perpendicular to the laser beam, was obtained, and then the behavior of split-injection diesel spray in a two-dimensional model combustion chamber in a high-temperature high-pressure constant-volume vessel was observed. Finally, the effects of injection mass ratios on the distributions of vapor and droplets and characteristics of fuel/air mixing were examined.