内混式空气雾化喷嘴雾化影响因素试验与仿真研究
Experimental and simulation study on the influencing factors of atomization of internal mixing air atomizing nozzles
郑沂怡 1李文璞 2邵和 1王鑫 1高玉荣 1陈曦1
作者信息
- 1. 太原理工大学 安全与应急管理工程学院,太原 030024
- 2. 太原理工大学 安全与应急管理工程学院,太原 030024;矿山岩层控制及灾害防控山西省重点实验室,太原 030024;山西省煤基资源绿色高效开发工程研究中心,太原 030024
- 折叠
摘要
为了研究3种内混式空气雾化喷嘴的适用场所,分析了空气雾化喷嘴的雾化特性,确定结构参数对喷嘴雾化特性的影响.基于VOF两相流模型及Realizable k-ε湍流模型,建立了三维稳态模型,分析3种内混式空气雾化喷嘴的雾化过程以及混合腔内压力和速度变化;搭建雾化试验平台,分析了3种内混式空气雾化喷嘴的雾化特性.结果表明:喷嘴的雾滴粒径与供气压力呈负相关关系,而与供水压力呈正相关关系;雾滴速度随供水和供气压力增加均呈现出增加的趋势;1号喷嘴的喷雾受工况参数影响较大,能够实现约为90°的雾化角和4.7 m的射程,雾滴粒径最小能达到8 μm,综合雾化性能好;2号喷嘴的大液滴被压缩空气推向两侧,形成的喷雾较为分散,雾化角度约为141°,射程约为1.5 m;3号喷嘴的液相受压缩空气作用集中在中央,形成的喷雾雾化角度约为20°,射程高达3.7 m,雾滴速度约为28 m/s.研究结果为喷嘴设计和完善喷雾降尘系统提供理论指导.
Abstract
In order to study the applicability of three types of internal mixing air atomization nozzles,the atomization characteristics of the air atomization nozzles were analyzed,and the influence of structural parameters on the atomization characteristics of the nozzles was determined.A three-dimensional steady-state model was established based on the VOF two-phase flow model and Realizable k-ε turbulence model to analyze the atomization process,pressure and velocity variations within the mixing chamber of these nozzles.An atomization experimental platform was set up to study their atomization characteristics.The results indicate that the droplet size of the nozzles is negatively related to air supply pressure and positively related to water pressure.Droplet velocity shows an increasing trend with higher water and air supply pressure.The atomization of the 1st nozzle is significantly influenced by operational parameters,it can achieve an atomization angle of around 90°,a range of 4.7 m,and a minimum droplet size of 8 μm,demonstrating excellent overall atomization performance.The 2nd nozzle compresses large droplets with air,dispersing them to the sides,resulting in a spray angle of approximately 141° and a range of about 1.5 m.The 3rd nozzle concentrates the liquid phase under action of compressed air in the center,producing an atomization angle of around 20°,a range of up to 3.7 m,and a droplet velocity of approximately 28 m/s.The research results provide theoretical guidance for nozzle design and improvement of spray dust suppression system.
关键词
内混式雾化喷嘴/数值模拟/雾化特性/结构参数Key words
internal-mixing nozzle/numerical simulation/atomization characteristics/structural parameters引用本文复制引用
基金项目
国家自然科学基金项目(51804210)
国家自然科学基金项目(51704145)
出版年
2024
国家科技期刊平台
NSTL
万方数据