基于PIV的泥泵叶轮内颗粒相对速度场的研究  

Study on the Relative Velocity Field of Particles in a Slurry Pump Impeller Using Particle Image Velocimetry

作　　者：徐立群[1,2] 倪福生[1,2] 刘明星[1,2] 顾磊[1,2] XU Li-qun NI Fu-sheng LIU Ming-xing GU Lei(Engineering Research Center of Dredging Technology of Ministry of Education, Hohai University, Changzhou 213022,China Hohai University, Changzhou 213022,China)

机构地区：[1]河海大学疏浚技术教育部工程研究中心,江苏常州213022 [2]河海大学,江苏常州213022

出　　处：《流体机械》2017年第5期6-10,共5页Fluid Machinery

摘　　要：泥泵是挖泥船的核心设备,泥泵性能与叶轮内泥砂颗粒的运动密切相关。本文采用PIV(粒子图像测速)测量技术,分别对中砂(粒径0.2~0.4 mm)和粗砂(粒径0.8~1 mm)在叶轮内的运动速度进行了测量。研究表明:中砂颗粒沿流道的相对速度变化趋势与液相相似,均在流道前半段出现高速区,在后半段出现低速区,且中砂颗粒的相对速度值均高于液相;而粗砂颗粒在叶轮流道内相对速度值变化较小,在流道前半段低于液相,在后半段与液相相差不大。Slurry pumps are the key component of a dredger. The performance of a slurry pump is closely related to the movement of the particles in its impeller. The relative velocities of medium sends （with particle diameter of 0.2~0.4mm） and coarse sands （with particle diameter of 0.8~1mm） in an impeller are severally measured using the measurement of Particle Image Velocimetry （PIV）. The results show that,the variation of the relative velocity of medium sands is similar to that of the liquid phase in the flow channel, wherea high-speed region appears in the first half with a low-speed region in the second half. Themedium sands are faster than the liquid phase in the whole flow channels. In contrast,the variation of the relative velocities of coarse sands along the flow channel is smaller. The movement of the coarse sands are slower than the liquid phase in the first half of the flow channel, but little different from the liquid phase in the second half.

关 键 词：相对速度 中砂 粗砂 叶轮 泥泵 PIV 

分 类 号：TH311[机械工程—机械制造及自动化] U616[交通运输工程—船舶及航道工程]