DEVELOPMENT OF A EULERIAN MODEL FOR THE “ATOMIZATION” OF A LIQUID JET
DEVELOPMENT OF A EULERIAN MODEL FOR THE “ATOMIZATION” OF A LIQUID JET
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DOI：
10.1615/atomizspr.v11.i6.20
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发表时间：
2001
影响因子：
1.2
通讯作者：
A. Vallet;A. Burluka;R. Borghi
中科院分区：
文献类型：
--
作者：
A. Vallet;A. Burluka;R. Borghi
本文提出了一种液体射流雾化的欧拉模型。在大雷诺数和韦伯数的限制下，雾化被认为是变密度流动中的湍流混合。一个类似于柯尔莫哥洛夫假设的假设已经被调用：流动的大尺度特征被认为是独立的粘度和表面张力在高雷诺数和韦伯数;小尺度特征依赖于粘度和表面张力。在气相中的液体的分散是由一个经典的方程计算的湍流扩散通量的液体。液体碎片的平均尺寸与每单位体积的液-气界面的平均表面积的新方程获得。讨论了这一新方程。与实验进行了比较，讨论了液体分散以及产生的碎片的平均尺寸。
In this article, a Eulerian model for the atomization of a liquid jet is proposed. Atomization is considered as turbulent mixing in a flow with variable density in the limit of large Reynolds and Weber numbers. An assumption similar to the Kolmogorov hypothesis has been invoked: large-scale features of the flow are supposed to be independent of viscosity and surface tension at high Reynolds and Weber numbers; small-scale features do depend on viscosity and surface tension. Dispersion of the liquid in the gas phase is computed by a classical equation for the turbulent diffusion flux of the liquid. The mean size of the liquid fragments is obtained with a new equation for the mean surface area of the liquid–gas interface per unit of volume. Discussions concerning this new equation are presented. Several comparisons with experiments are presented, сoncerning the liquid dispersion as well as the mean size of fragments produced.