同轴离心式喷嘴两相喷雾浓度场理论计算模型

Computational Model of Two-Phase Flow Spray Concentration Field in Coaxial Swirling Injector

提出了模拟两相喷雾流场的液滴湍流弥散过程的模型。该模型采用了轨道扩散模型的基本思想，把液雾尺寸分布按液滴直径分成有限尺寸组，每组液滴都追随各自的平均轨道。计算平均轨道时每组液滴就像一个液滴的行为。与随机轨道模型不同的是本模型考虑同一组内的液滴在流场中的湍流扩散，认为每一液滴尺寸组中的液滴以其平均轨道为中心有一个高斯分布。

In this paper, a computational model for simulating turbulent dispersion of droplets in two-phase flow spray field is presented. Liquid spray size distribution is divided into some droplets groups, which has a initial mass mean diameter differing from each other.All of the droplets in same group have the same diameters, chemical components, temperature and velocity. The droplet turbulent disperse in the same group are considered in the calculation. By comparisons it is demonstrated that calculated result is basically identical with tested result.