Airflow and Fuel Spray Interaction in a Gasoline DI Engine
Airflow and Fuel Spray Interaction in a Gasoline DI Engine
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汽油 DI 发动机中的气流和燃油喷雾相互作用
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Gold
中科院分区：
文献类型：
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作者：
P. Alexander;S. Begg;M. Heikal;Gang Li;M. Gold
采用两种光学技术和CFD模拟方法研究了直喷汽油机进气气流与燃油喷雾的相互作用。燃烧室是一个pent-roof结构与侧面安装的喷油器位于低之间的进气门喷射在一个54 o角的气缸轴线。二维活塞碗形状允许光学访问的米氏散射技术被用来调查液体燃料的行为在中心轴向平面的气缸位于中间的两个进气阀和通过中心线的喷射器喷嘴之间。第二组图像是使用背光获得的，这一次通过玻璃气缸套直接朝向喷油器。使用VECTIS软件运行缸内模拟。对20°和80° ATDC之间的早期SOI时序范围进行了测量和模拟。结果清楚地表明，来流倾向于使射流变平，并将其约束在射流中心线上。
Two optical techniques together with a CFD simulation have been used to study the interaction of intake airflow with the injected fuel spray in a motored direct injection gasoline engine. The combustion chamber was of a pent-roof construction with the side-mounted injector located low down between the inlet valves injecting at a 54 o angle to the cylinder axis. The two-dimensional piston bowl shape allowed optical access for the Mie scatter technique to be used to investigate the liquid fuel behaviour in the central axial plane of the cylinder lying midway between the two inlet valves and passing through the centre line of the injector nozzle. A second set of images was obtained using backlighting, this time looking through the glass cylinder liner directly towards the injector. The in-cylinder simulation was run using the VECTIS software. Measurements and simulations were conducted for a range of early SOI timings between 20° and 80° ATDC. The results demonstrated clearly that the incoming airflow tended to flatten the jet and constrain it towards its centreline.