Evaporation characterization of fuel spray impinging on a flat wall by laser-based measurement

Evaporation characterization of fuel spray impinging on a flat wall by laser-based measurement
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通过激光测量对撞击平坦壁面的燃油喷雾进行蒸发表征

DOI:
10.1177/1468087416671479
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发表时间:
2017-10
期刊:
International Journal of Engine Research
影响因子:
--
通讯作者:
Keiya Nishida
Keiya Nishida
中科院分区:
其他
文献类型:
--
作者:
Yuyin Zhang;Shiyan Li;Wenyuan Qi;Keiya Nishida

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由于燃油的雾化、蒸发以及与氧的混合是燃烧过程的主要过程,因此,对燃油喷雾碰壁后的蒸发特性进行定量分析是发动机燃烧模拟的重要内容。本文利用紫外-可见激光吸收散射成像技术,对柴油喷雾中的汽液质量分布进行了定量研究。喷雾是在环境压力为4 MPa、环境温度为833 K的条件下,从一个带有共轨喷射系统的单孔喷嘴喷射出来的。对燃油蒸气的总质量、蒸气相所覆盖的喷雾体积和夹带到喷雾中的空气质量进行了表征。结果表明,这些参数随时间的变化可以用幂律函数Yi = kits.1.5来表示,其中Yi代表蒸汽质量等,ts是喷射开始后的时间,ki是与Yi对应的系数。parameter.like从雾化和蒸发理论出发,分析和讨论了该幂律函数的物理意义,并利用不同喷射量条件下的测量数据进行了验证
It is of interest for engine combustion modeling to quantify the evaporation behaviors of fuel spray impinging on a wall as.the fuel atomization, evaporation, and mixing with oxygen in the combustion chamber usually dominate the subsequent.combustion processes. In this study, the vapor and liquid mass distributions in diesel-like fuel sprays were quantified using.the ultraviolet-visible laser absorption scattering imaging technique. The sprays were injected from a single-hole nozzle.with a common-rail injection system and impinged on a flat wall at an ambient pressure of 4 MPa and an ambient temperature.of 833 K. The mass of the total fuel vapor, the spray volume covered by the vapor phase, and the air mass.entrained into the spray were characterized. The results indicate that the time evolution of these parameters until.shortly after the end of injection can be expressed by a power-law function, Yi = kits.1.5, where Yi represents the parameter.like vapor mass and so on, ts is the time after start of injection, and ki is the coefficient corresponding to Yi. The.physics behind this power-law function was analyzed and discussed based on the theory of atomization and evaporation,.and verified using measurement data obtained under different conditions of injection quantity
DOI: 10.1017/cbo9780511529566.006
发表时间: 1999
期刊: --
影响因子: --
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