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螺旋滚筒喷嘴内流场数值模拟研究
供稿: 田震；荆双喜；赵丽娟；高珊；张成光 时间: 2019-10-23 次数:

作者：田震；荆双喜；赵丽娟；高珊；张成光

作者单位：周口师范学院机械与电气工程学院；河南理工大学机械与动力工程学院；辽宁工程技术大学机械工程学院

摘要：为提高螺旋滚筒的喷雾降尘效果,改善井下作业环境,基于流体动力学理论,建立喷嘴内部流场模型。对不同喷嘴口径、旋流芯中心孔口径以及喷雾压力的喷嘴喷雾过程进行数值模拟,得到不同参数条件下流体速度的分布规律:喷嘴口径在一定范围内适当增大能够增加内部湍流区域,进而提高出口位置流体的流出速度;旋流芯中心孔直径的增大虽然在一定程度上增加中心孔射流对旋流场的扰动,但是对流体喷出速度影响不大;随着喷雾压力提高,流体内部湍流动能得到加强,喷嘴出口流速得到提高。对工业性试验中工作面粉尘质量浓度进行测定,在滚筒喷雾系统开启后降尘率达到90%以上,工作面粉尘质量浓度得到了有效降低。

基金：国家自然科学基金资助项目(51674134)；河南省科技攻关项目(182102210606)；河南省自然科学基金资助项目(182300410250)；周口师范学院高层次人才启动项目(ZKNUC2017034)；

关键词：螺旋滚筒;喷雾系统;内流场;流体速度;数值模拟;

DOI：10.16186/j.cnki.1673-9787.2019.5.12

分类号：TD714.4

Numerical simulation of internal flow field of spiral drum nozzle

TIAN ZhenJING ShuangxiZHAO LijuanGAO ShanZHANG Chengguang

College of Mechanical and Electrical Engineering, Zhoukou Normal UniversitySchool of Mechanical and Power Engineering, Henan Polytechnic UniversityCollege of Mechanical Engineering, Liaoning Technical University

Abstract：In order to improve the effect of dust reduction on the spiral drum and improve the working environment, the internal flow field model was established based on the fluid dynamics theory.Numerical simulation of nozzle spray process was carried out on different nozzle diameter, center hole diameter and spray pressure.The distribution of fluid velocity under different parameters was obtained.Nozzle diameter in a range of appropriate increases could increase the internal turbulent flow region, and the outflow velocity of fluid in the outlet position could be improved.The increase of the center hole diameter of the vortex core could increase the disturbance of the center hole jet on the vortex field, but it had little effect on the jet velocity of the fluid.With the increase of spray pressure, the internal turbulent kinetic energy of the fluid was strengthened, and nozzle exit flow rate could be improved.Dust removal rate of the roller spray system was found to reach more than 90% through the measurement of dust concentration in the industrial experiment, and the dust concentration in the working face had been effectively reduced.

Received：2019-01-08

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