Behavior of diesel spray impinging on a wall
Behavior of diesel spray impinging on a wall
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DOI：
10.1299/kikaib.54.1861
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发表时间：
1988-07
期刊：
影响因子：
--
通讯作者：
Atsushi Sakane;Y. Hamamoto;T. Sumimoto
中科院分区：
文献类型：
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作者：
Atsushi Sakane;Y. Hamamoto;T. Sumimoto
为了研究柴油机燃烧室内燃油与空气的混合过程，采用燃油喷雾阴影照片图像分析方法，研究了未蒸发喷雾与燃烧室平面壁面碰撞后的行为及其燃油浓度分布。在燃料垂直喷向被燃料润湿的丙烯酸板的条件下，对喷射压力、环境气体密度和喷嘴直径的变化规律进行了实验研究。喷雾撞击促进了燃油与环境气体的混合，喷嘴与壁面距离越近，混合效果越好。与自由喷雾相比，喷雾与壁面的碰撞能产生更多的环境气体，尤其是在喷嘴直径较大的情况下。得到了撞击后喷雾发展的经验关系式，并与实验结果进行了比较。(12图，表1，参考文献9）
In order to clarify a mixing process of injected fuel and air at a combustion chamber of a diesel engine, the behavior of unvaporized spray and its fuel concentration distribution after impinging on a plane wall of the combustion chamber were investigated by the image analysis of shadow photographs of fuel spray. Experimental studies were conducted with variation of the patterns of injection pressure, ambient gas densities and diameters of injection nozzles under the conditions which fuel was injected perpendicularly to an acrylic plate wetted by fuel. The mixing between fuel and ambient gas was promoted by the spray impingement, and the shorter the distance between the injection nozzle and the wall was placed, the bigger the mixing was effected. More quantities of ambient gas entrained into spray was observed by the spray impingement on a wall than one of free spray, especially with bigger diameter of nozzles. The empirical relations for the spray development after impingement on the plane wall were obtained and compared with experimental results. (12 figs, 1 tab, 9 refs)