U形管内浆体输送特性研究  

Study on Slurry Transport Characteristics in U-Shaped Pipe

作　　者：栗涛杰 肖兰兰 杨兆霞 刘学文 LI Taojie;XIAO Lanlan;YANG Zhaoxia;LIU Xuewen(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Unit95958 of the PLA,Shanghai 200120,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]中国人民解放军95958部队,上海200120

出　　处：《轻工机械》2022年第3期54-58,65,共6页Light Industry Machinery

基　　金：上海市地方能力建设基金(19030501100);新能源汽车振动噪声测试与控制专业技术服务平台资助项目(18DZ2295900)。

摘　　要：为了探究通过U形管路输送不同质量分数颗粒的浆体流变特性,课题组对其内部流场进行了研究。通过计算流体动力学软件FLUENT对水平U形管内浆体的流动进行了数值模拟,获得了入口段、出口段及弯头等5个截面处颗粒的速度和体积分数分布情况,并且通过计算分析了速度、颗粒质量分数和管径对弯管压降的影响。研究结果表明:在弯头处二次流的存在,导致弯头局部流动情况变得复杂,使得截面内侧颗粒体积分数高于外侧;管道沿线的压降受流速和颗粒质量分数的影响很大,随着颗粒质量分数的增加,剪切应力和剪切黏度的增加导致压降增大。课题组的研究有助于了解颗粒质量分数和流速对浆体流变的影响。In order to explore the rheological properties of slurry with different particle mass fraction transported through U-shaped pipeline,the internal flow field was studied.The flow of slurry in horizontal U-shaped pipe was numerically simulated by computational fluid dynamics software FLUENT,and the distribution of particle velocity and volume fraction at 5 sections including inlet section,outlet section and elbow were obtained.The influence of velocity,particle mass fraction and pipe diameter on pressure drop of elbow were analyzed by calculation.The results show that the existence of secondary flow at the elbow complicates the local flow in the elbow,which makes the volume fraction of particles on the inner side of the cross-section higher than that on the outer side,and the pressure drop along the pipe is greatly affected by the velocity and the mass fraction of particles;with the increase of particle mass fraction,the pressure drop increases with the increase of shear stress and shear viscosity.The study is helpful to understand the influence of particle mass fraction and flow rate on the rheological behavior of slurry.

关 键 词：U形管 浆体 流变特性 计算流体动力学 FLUENT 

分 类 号：TH122[机械工程—机械设计及理论]