金属溶液雾化器中气体流场的计算模拟与分析

Simulation and Analysis of Gas Flow Field in Metallic Solution Atomizer

本文基于一种旋涡环缝式雾化器,采用Catia建立实体模型,ICEM对模型进行网格划分,Fluent进行对气流流场的数值模拟计算,研究了气体流过雾化器内部的流动过程以及气流从雾化器环缝喷嘴喷出后的射流流场特性。研究发现气流在雾化器内部的流动存在漩涡,从雾化器环缝喷嘴喷出后,射流呈空心的对顶气锥形态,且存在一个旋度。沿喷射方向,射流流速逐渐减小,射流宽度增加。通过对雾化器流场的计算模拟分析,可以为改进该雾化器雾化性能提供依据。

Based on a vertical loop slot atomizer, Catia was used to establish the solid model. The grid was di-vided by ICEM. Fluent was used to simulate the flow field. The flow field characteristics of the gas flowing through the atomizer and the characteristics of the jet spraying out from the atomization nozzle of the atomizer were studied. It was found that there were vortices in the flow inside the at-omizer. After ejecting from the atomizer nozzle, the jet appeared in the shape of a hollow double cone and there was a rotation. Along the ejecting direction, the flow rate of the jet decreased and the width of the jet increased. Through the calculation and analysis of the flow field of the atomi- zer, it provides the basis for improving the atomization performance of the atomizer.