雾化过程的数值模拟研究综述

Overview on numerical simulations of primary atomization

雾化过程的数值模拟主要有3类方法:简单工程模型、准直接数值模拟和多尺度仿真。对这3类方法的基本思想、优缺点和研究应用等情况进行了全面的总结。雾化过程的多尺度仿真,对大块液体的运动采用准直接数值模拟的思想,对小于网格尺度的小液滴采用模型来封闭。这种方法不仅能够反映雾化过程的主要特性,而且计算量适中,已经成为雾化过程数值模拟新的研究方向。

There are three simulation methods for primary atomization： simplified engineering models, DNS （Direct Numerical Simulation）-like simulation and multi-scale simulations. Fundamental ideas, advantages and disadvantages, application status of the three methods are summarized thoroughly in this paper. For the multi-scale simulation method, the blobs larger than the grid volume are captured by the DNS-like method, and those droplets smaller than the grid volume are tracked by simple models. This method can capture the main characteristics of the primary atomization, and its computational cost is moderate. It has become a new research direction for the primary atomization process.