中南大学学报（自然科学版）2018，Vol.49Issue(5)：1272-1280,9.DOI:10.11817/j.issn.1672-7207.2018.05.031
超高喷射压力下GDI喷油器喷雾宏观特性
Spray macroscopic characteristics of GDI injector under ultra-high injection pressure
摘要
Abstract
In order to explore the spray macroscopic characteristics of GDI(gasoline direct injection) injector under the ultra-high injection pressure, the spray under the injection pressures from 5 MPa to 60 MPa was measured by the shadow photographic method, and the effects of injection pressure on the spray development process, the spray penetration, the spray angle, the spray area and the post injection phenomenon were analyzed. The calculation formula of gasoline spray penetration under the ultra-high pressure was obtained by modifying the DENT empirical formula. The results show that the increase of injection pressure promotes the generation of "branch-like structure" on the outside of the spray. The increase of injection pressure increases the spray penetration obviously. As the injection pressure increases, the spray area increases, but its increasing rate decreases gradually. When the injection pressure increases 10 MPa, the spray angle peak increases by 1.5° on the average. When the injection pressure reaches 30 MPa or above, the post injection phenomenon disappears basically. Along with the development of the spray, the spray penetration and the spray area increases linearly to a certain extent; the spray angle increases first and then decreases, and finally stabilizes at about 82°.关键词
超高/喷雾/宏观特性/GDI喷油器/喷射压力Key words
ultra-high/spray/macroscopic characteristic/GDI injector/injection pressure分类
能源科技引用本文复制引用
张丹,裴毅强,王琨,王同金,刘斌,胡铁钢,王振平,季思思..超高喷射压力下GDI喷油器喷雾宏观特性[J].中南大学学报（自然科学版）,2018,49(5):1272-1280,9.基金项目
国家科技支撑计划项目(2014BAG10B01)(Project(2014BAG10B01)supported by the National Key Technology Support Program) （2014BAG10B01）
