VAPOR DISTRIBUTION MEASUREMENT OF HIGHER AND LOWER VOLATILE COMPONENTS IN AN EVAPORATING FUEL SPRAY VIA LASER ABSORPTION SCATTERING (LAS) TECHNIQUE
VAPOR DISTRIBUTION MEASUREMENT OF HIGHER AND LOWER VOLATILE COMPONENTS IN AN EVAPORATING FUEL SPRAY VIA LASER ABSORPTION SCATTERING (LAS) TECHNIQUE
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DOI：
10.1080/00102200600672037
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发表时间：
2007-04
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
本文提出了一种基于LAS技术的激光成像技术，用于测量多组分燃油喷雾中低挥发分和高挥发分的蒸气分布。对于含有正辛烷的双组分燃油喷雾，（沸点：399 K）和正十三烷（沸点：508 K），用对二甲苯测定了低沸点组分正辛烷的汽相分布（沸点：411 K）作为其替代物，其具有类似的物理性质并且吸收紫外光但不吸收可见光，根据LAS技术的要求，同样，高沸点（HBP）组分，正十三烷，已获得通过使用α-甲基萘（沸点：517 K）的蒸汽行为。结果表明，在473 K时，LBP和HBP组分在喷雾羽流中的蒸发速率差异较大，但随着环境温度升高到573 K，这种差异显著减小; LBP组分主要在喷雾羽流的外部区域蒸发，而HBP主要在喷雾羽流的内部区域蒸发。
Abstract A laser imaging technique has been proposed in this article for measuring vapor distribution of lower and high volatile components in a multicomponent fuel spray, based on the LAS technique. For a two-component fuel spray which contains n-octane (boiling point: 399 K) and n-tridecane (boiling point: 508 K), vapor distribution of the low boiling point (LBP) component, n-octane, has been determined by using p-xylene (boiling point: 411 K) as its substitute, which has the similar physical properties and absorbs the ultraviolet light but not the visible light, according to the requirements of the LAS technique. Likewise, vapor behavior of the higher boiling point (HBP) component, n-tridecane, has been obtained by using α-methylnaphthalene (boiling point: 517 K). It has been found that difference in vaporization rate between the LBP and HBP components is great over the spray plume at 473 K, this difference, however, reduces significantly as the ambient temperature increases to 573 K; The LBP component vaporizes mainly in the outer region, while the HBP mostly in the inner region of the spray.