中南大学学报（自然科学版）2018，Vol.49Issue(6)：1548-1554,7.DOI:10.11817/j.issn.1672-7207.2018.06.031
GDI喷油器高温汽油的近场射流特性
Jet flow characteristics of high temperature gasoline in GDI injector
摘要
Abstract
The near field jet characteristics of ultra-high temperature gasoline in the GDI injector with Mie scattering method and micrograph technique were studied. The results show that with the increase of temperature, the gasoline expends near the nozzle tip and collapses in the middle. Mach disk appears near the injector when the gasoline temperature exceeds a specific value. At the same injection pressure, jet expansion angle is similar to the cryogenic jet angle in the low temperature zone, and there is a rapid growth in the middle temperature zone. The trend flattens out in the high temperature zone. Mach disk size increases with the increase of gasoline temperature, and Mach disk position is not affected by gasoline temperature obviously. At the same gasoline temperature, expansion angle, Mach disk size, and Mach disk position increase with the increase of injection pressure. In addition, the high temperature gasoline jet droplets are smaller than the cryogenic gasoline jet by contrast of jet images.关键词
高温汽油/Mie散射法/近场/膨胀角/马赫盘Key words
high temperature gasoline/Mie scattering/near field/expansion angle/Mach disk分类
能源科技引用本文复制引用
杨渊博,裴毅强,任源,王志东,刘懿,吕刚..GDI喷油器高温汽油的近场射流特性[J].中南大学学报（自然科学版）,2018,49(6):1548-1554,7.基金项目
国家自然科学基金资助项目(51376202)(Project(51376202) supported by the National Natural Science Foundation of China) （51376202）
