A numerical investigation of an engine oil droplet normally impinging onto oil pan within crankcase of an IC engine
A numerical investigation of an engine oil droplet normally impinging onto oil pan within crankcase of an IC engine
复制标题
对通常撞击内燃机曲轴箱内油底壳的发动机油滴进行数值研究
DOI：
10.1016/j.compfluid.2013.11.029
复制
发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
乔信起
中科院分区：
文献类型：
--
作者：
白金龙;乔信起
本文采用VOF方法结合树型自适应局部网格加密技术，对内燃机曲轴箱中油滴垂直撞击油面的过程进行了数值模拟，为发动机油液特性的研究提供了依据。考虑了三种不同Wenumbers和ReNumber的情况来模拟液滴合并、液滴边缘飞溅和液滴飞溅的过程。对于所有情况，在t = 0 ms左右，液滴和液体表面之间的速度和压力上升到一个峰值，然后下降到一个准稳定值。无因次中心高度在每种情况下都表现出大致相同的趋势：先急剧下降，然后呈对数增长。随着时间的推移，随着冲击能量的耗散，中心高度曲线趋于零。无因次最大高度可分为三个部分，有三个峰值：（a）冠顶;（B）冠在壁上扩展;（c）中心反弹液体。无量纲冠半径显示出类似的双曲线型形状。局部网格细化程度越高，相界面越精确，但计算时间和存储空间越大。
In this paper, the VOF method coupled with tree-based adaptive local mesh refinement technology is used for numerical simulation of an oil droplet normally impinging onto oil surface within crankcase of an internal combustion engine to provide evidence for the research of engine oil character. Three cases with differentWenumbers andRenumber are considered to simulate the process of droplet coalescence, droplet marginal splashing and droplet splashing. For all cases, at time aroundt= 0 ms, the velocity and pressure rises to a peak between droplet and liquid surface, and then decreased to a quasi-stable value. The dimensionless center height shows an approximate same trend for each case: firstly decreases sharply and then shows a logarithmic growth. As time goes on, the center height curve will approach zero with the impinging energy dissipating. The dimensionless maximum height can be divided into three parts with three peaks: (a) the crown crest; (b) the crown spreading on the wall; (c) the center rebounding liquid. The dimensionless crown radius shows a similar hyperbolic-type shape. A case with higher local mesh refinement levels shows more accurate phase interface which costs more computational time and storage.
登录
查看更多内容
影响因子：
3.7
作者：
M. Rein
通讯作者：
M. Rein
影响因子：
4.1
作者：
Y. Chang;T. Hou;B. Merriman;S. Osher
通讯作者：
Y. Chang;T. Hou;B. Merriman;S. Osher
影响因子：
4.6
作者：
HARLOW, FH;WELCH, JE
通讯作者：
WELCH, JE
影响因子：
9.9
作者：
Francisco J. Rodríguez;R. Mesler
通讯作者：
Francisco J. Rodríguez;R. Mesler
影响因子：
4.1
作者：
BRACKBILL, JU;KOTHE, DB;ZEMACH, C
通讯作者：
ZEMACH, C