Velocity and Drop Size Measurements in Fuel Sprays in a direct injection diesel engine
Velocity and Drop Size Measurements in Fuel Sprays in a direct injection diesel engine
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DOI：
10.1002/ppsc.19900070129
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发表时间：
1990
影响因子：
2.7
通讯作者：
G. Pitcher;G. Wigley;M. Saffman
中科院分区：
文献类型：
--
作者：
G. Pitcher;G. Wigley;M. Saffman
利用激光和相位多普勒测速技术，在单缸研究型柴油机上进行了高压喷射燃油喷雾的研究，测量了喷雾中燃油液滴的速度和尺寸及其时空分布。这些测量涉及在单孔喷嘴下游75至100个喷嘴直径之间的喷雾中心线上确定液滴的轴向速度分量和直径。该实验计划涵盖了柴油和非燃烧酒精燃料的使用。对于酒精燃料，还在喷雾中的径向位置和不同燃料负荷下进行了测量。给出了液滴速度和大小的时间分辨测量值以及时间平均值，以分离每个喷雾的前部和后部区域的贡献，并根据喷雾行为的概念模型确定发生的两种不同的破碎机制。
High-pressure injection fuel sprays have been investigated in a single-cylinder research Diesel engine using the laser and phase Doppler anemometry techniques to measure fuel droplet velocities and sizes and their spatial and temporal distributions within the spray. The measurements relate to the determination of the droplets' axial velocity component and diameter on the spray centre line between 75 and 100 nozzle diameters downstream from a single-hole injector nozzle. The experimental program covered the use of both Diesel and a non-combusting alcohol fuel. Measurements at radial locations in the spray and at different fuel loads were also taken for the alcohol fuel. Temporally resolved measurements of droplet velocity and size are presented together with time — averaged values in such a way as to isolate the contributions from the leading and trailing regions of each spray and identify two different break — up mechanisms occurring as suggested by a conceptual model of the spray behaviour.