摘要
为了提供一种基于内部流场特性的内溢流管长度优化新方法,系统研究了水力旋流器内溢流管长度变化对湍流强度、空气柱、压强、速度分布等流场特性指标及沉砂分配率、颗粒空间分布等分级性能指标的影响规律。结果表明,对于直径50 mm水力旋流器,当内溢流管过短(l<16 mm)或过长(l>56 mm)时,旋流器内部湍流强度较高,空气柱稳定性降低,部分压力能转换为内能而被浪费,切向速度较小,轴向零速包络面LZVV形状不规则,内部流场稳定性较差。最佳的内溢流管长度为16 mm≤l≤56 mm,此时旋流器内湍流强度较低、空气柱稳定、颗粒空间分布规律性强,分级精度较高。研究结果可为水力旋流器的结构设计提供理论指导。
In order to provide a new optimization method of vortex finder length based on inner flow field characteristics,experiments are conducted to systematically investigate the effects of vortex finder length on the indexes of the flow field characteristics and classification performance,such as turbulence intensity,air core,pressure,velocity distribution,recovery to underflow,spatial distribution,etc.Results show that for the hydrocyclone with a diameter of 50 mm,when the vortex finder is too short(l<16 mm)or too long(l>56 mm),the turbulence intensity is high,the stability of the air core is reduced,part of the pressure energy is converted into internal energy and wasted,the tangential velocity is small,the shape of the LZVV is irregular,and the stability of the inner flow field is poor.The optimal range of vortex finder length is from 16 mm to 56 mm,in which the turbulence intensity is low,the air core is stable,the spatial distribution of particles is regular,and the classification sharpness is higher.The results can provide theoretical guidance for the structure optimization of hydrocyclone.
作者
张彩娥
张铭宇
史济泓
潘程尧
陆帅帅
ZHANG Caie;ZHANG Mingyu;SHI Jihong;PAN Chengyao;LU Shuaishuai(School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255000,China)
出处
《金属矿山》
CAS
北大核心
2023年第6期167-172,共6页
Metal Mine
基金
国家自然科学基金项目(编号:52004153)
山东省自然科学基金项目(编号:ZR2020QE139,ZR2020QE143)。
关键词
水力旋流器
溢流管长度
内部流场
分级性能
数值试验
hydrocyclone
vortex finder length
inner flow field
classification performance
numerical experiments
