Jet and Vortex Ring-Like Structures in Internal Combustion Engines: Stability Analysis and Analytical Solutions
Jet and Vortex Ring-Like Structures in Internal Combustion Engines: Stability Analysis and Analytical Solutions
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内燃机中的射流和涡环结构：稳定性分析和解析解
DOI：
10.1016/j.piutam.2013.04.025
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Sazhin S
中科院分区：
文献类型：
--
作者：
Sazhin S
综述了近年来发展的模型，描述了液体射流的解体和涡流环结构在柴油机和类似汽油机条件下的动力学。给出了圆形粘性流体射流的模态和非模态水动力不稳定性的对比分析结果。本文将涡环模型预测的涡环平动速度解析公式与基础方程的数值解结果和实验数据进行了比较。本文讨论了一种两相二维流动数值模拟的新方法，该方法是基于离散相的全拉-格朗日方法和载相的涡团方法的结合。
Recently developed models, describing the disintegration of liquid jets and the dynamics of vortex ring-like structures at Die- sel and gasoline engine-like conditions, are reviewed. The results of comparative analysis of modal and non-modal hydrody- namic instabilities of round viscous fluid jets are presented. Analytical formulae for vortex ring translational velocities, pre- dicted by vortex ring models, are compared with the results of numerical solutions to the underlying equations and experimen- tal data. A new approach to numerical simulation of two-phase two-dimensional flows, based on a combination of the full La- grangian method for the dispersed phase and the vortex blob method for the carrier phase, is discussed.