重庆理工大学学报(自然科学) ›› 2023, Vol. 37 ›› Issue (2): 298-306.doi: 10.3969/j.issn.1674-8425(z).2023.02.033

• “第 23届流体动力与机电控制工程国际学术会议”专栏 • 上一篇    下一篇

空气雾化喷嘴内流场的特性分析

陈有锦,袁锐波,张 剑   

  1. 1.昆明理工大学 机电工程学院,昆明 650504; 2.昆船智能技术股份有限公司,昆明 650500
  • 出版日期:2023-03-21 发布日期:2023-03-21
  • 作者简介:陈有锦,男,硕士研究生,主要从事给烟草加料设备研究,Email:chen_17607135466@163.com;通讯作者 袁锐 波,男,博士,教授,主要从事流体传动与控制研究,Email:kmust_yrb@163.com。

Characteristic analysis of flow field in an air atomizing nozzle

  • Online:2023-03-21 Published:2023-03-21

摘要: 提出了基于仿真软件研究空气雾化喷嘴的内流场特性的方法,通过 CFD仿真软件 分析了不同气体压力、不同液体流量对喷嘴内流场的速度、湍动能以及液体体积分数的影响。 研究表明:混合腔中径向截面积不变时,速度和湍动能几乎不随气体压力或液体流量的变化而 发生变化,液体体积分数均匀速下降。在混合腔的径向截面积缩小以后,当液体流量一定时,速 度和湍动能与气体压力呈正相关关系,且增长的幅度也越大。而液体体积分数随着气体压力的 增大不断下降,减小的幅度也不断增大,气体动力增大的同时对液体的约束力逐渐增强。当气 体压力一定时,根据气体压力的增加,速度和湍动能随着液体流量的增加出现上升的趋势,但增 加的幅度逐渐减小,液体体积分数随液体流量的增加逐渐下降,但减小的幅度也逐渐减小。

关键词: 空气雾化喷嘴, 内流场特性分析, 湍动能

Abstract: This paper proposes a method to study the internal flow field characteristics of air atomizing nozzles based on a simulation software. The effects of different gas pressures and different liquid flows on the velocity, turbulent kinetic energy and liquid volume fraction of the flow field in the nozzle are analyzed by CFD simulation software. The results show that the velocity and turbulent kinetic energy hardly change with the change of gas pressure or liquid flow rate when the radial cross-sectional area of the mixing chamber is constant, and the liquid volume fraction keeps a uniform decreasing trend. After the radial sectional area of the mixing chamber reduces, the velocity and turbulent kinetic energy are positively correlated with the gas pressure when the liquid flow is constant, and the increasing amplitude is larger. The volume fraction of the liquid decreases with the increase of gas pressure, and the decreasing amplitude also increases constantly. The binding force on the liquid gradually increases with the increase of gas force. When the gas pressure is constant, the velocity and turbulent kinetic energy increase with the increase of the liquid flow, but the increasing amplitude gradually decreases. The liquid volume fraction decreases with the increase of the liquid flow, but the decreasing amplitude also gradually diminishes.

中图分类号: 

  • TS43