大型疏浚泥泵固液两相流场特性的数值模拟分析  

Numerical simulation analysis of solid-liquid two-phase flow field characteristics of large dredging pump

作　　者：刘明明[1] 庄海飞[1] 胡京招[1] LIU Mingming;ZHUANG Haifei;HU Jingzhao(National Engineer Research Center of Dredging Technology and Equipment,Shanghai 200082,China)

机构地区：[1]疏浚技术装备国家工程研究中心,上海200082

出　　处：《水运工程》2023年第7期230-236,共7页Port & Waterway Engineering

摘　　要：基于欧拉双流体模型对绞吸挖泥船大型泥泵进行固液两相流的非定常数值模拟计算,通过对比分析颗粒粒径、颗粒浓度、颗粒密度对两相流线、固相颗粒浓度分布等流场特性的影响,为提高疏浚泥泵的优化设计提供指导。模拟结果表明,颗粒物理特性对液相流线分布的影响较小,随着颗粒粒径增大,液相对固相的带动作用减弱;随着颗粒密度的增大,液相对固相的带动作用未减弱;随着颗粒浓度增大,液相对固相的带动作用增强;随着粒径和密度增大,颗粒分布不均性加强;随着颗粒浓度的增大,颗粒浓度分布均匀性加强,靠近叶片壁面浓度明显增大。对比了两种泥泵流道的颗粒浓度分布,通过叶轮流道的优化设计,可以减少颗粒在流道表面的集聚,降低泥泵磨损。Based on the Euler two-fluid model,the unsteady numerical simulation of solid-liquid two-phase flow of large dredging pump of cutter suction dredger is carried out.Through the analysis of the effects of particle size,particle concentration and particle density on the flow field characteristics of dredging pump including the two-phase streamline and solid particle concentration distribution,it provides guidance for improving the optimal design of dredging pump.The simulation results show that the physical properties of particles have little effect on the streamline distribution of liquid phase,and the driving effect of liquid relative to solid phase decreases with the increase of particle size.With the increase of particle density,the driving effect of liquid relative to solid does not weaken.With the increase of particle concentration,the driving effect of liquid relative to solid phase increases.With the increase of particle size and density,the uneven distribution of particles increases.With the increase of particle concentration,the uniformity of particle concentration distribution strengthened,and the concentration near the blade wall increased significantly.By comparing the particle concentration distribution of the two dredging pumps,the reasonable design of the impeller channel can reduce the agglomeration of particles on the surface of the channel and the abrasion of the dredging pump.

关 键 词：疏浚泵 磨损 固液两相流 流场特性 

分 类 号：U616[交通运输工程—船舶及航道工程] TH311[交通运输工程—船舶与海洋工程]