基于Fluent的拉瓦尔喷嘴雾化特性数值模拟  

Numerical simulation of spray characteristics of Laval nozzle based on Fluent

作　　者：赵向锋 陈绍杰[2] ZHAO Xiangfeng;CHEN Shaojie(North China Institute of Science and Technology,Yanjiao,065201,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201 [2]华北科技学院,北京东燕郊065201

出　　处：《华北科技学院学报》2020年第2期10-15,共6页Journal of North China Institute of Science and Technology

基　　金：中央高校基本科研业务费资助项目(3142015105)。

摘　　要：为进一步探索拉瓦尔喷嘴的流动特性,采用基于有限元与VOF相互结合方法对拉瓦尔喷嘴内外流场进行数值模拟。从计算结果中得到了喷嘴内外气液两相分布及速度分布规律,并对其流场的结构和形态进行分析。利用数值模拟对雾滴粒径分析表明,当喷嘴进口与出口面积之比为3∶1时,进水孔水流速度为22 m/s喷嘴综合雾化效果最好。研究结果对喷嘴结构设计以及井下除尘具有一定的参考价值。In order to further explore the flow characteristics of Laval nozzle,the internal and external flow field of Laval nozzle is simulated based on the combination of finite element and VOF.The gas-liquid two-phase distribution and velocity distribution in and out of the nozzle are obtained from the calculation results,the structure and shape of the flow field are analyzed.Based on the analysis of droplet size by numerical simulation,several conclusions are drawn:when the ratio of nozzle inlet area to outlet area is 3∶1 and the water flow velocity of the inlet hole is 22 m/s,the comprehensive atomization effect of the nozzle is the best.The result has certain reference value for nozzle structure design and underground dust removal.

关 键 词：拉瓦尔喷嘴 有限元分析 雾滴粒径 数值模拟 

分 类 号：TD714.4[矿业工程—矿井通风与安全]