摘要
为研究冰粒对船用离心泵压力脉动的影响,基于CFD数值模拟方法,采用欧拉-拉格朗日模型对不同冰粒体积分数工况下和不同冰粒直径工况下离心泵的压力脉动特性进行研究。通过试验与仿真结果分析发现:叶轮流道各区域的压力脉动随着冰粒体积分数增加而增加,当冰粒体积分数ϕ=0.09时,叶轮中部区域的压力脉动变化最为显著;压力脉动随着冰粒体积分数的增加而增加,蜗壳出口处压力脉动变化趋势表现出不明显的异向性;当冰粒直径d=0.5mm时,叶轮中部区域的压力脉动最大,叶轮出口处的压力脉动随着冰粒直径的增大而增大,叶轮中部区域的压力脉动随着冰粒直径的增加而减小;蜗壳流道处的压力脉动受冰粒直径影响较小,整体表现为随着冰粒直径的增加而增大。
In order to study the influence of ice particles on the pressure pulsation of marine centrifugal pumps,based on the CFD numerical simulation method,the Euler-Lagrangian model is used to analyze the pressure pulsation characteristics of the centrifugal pump under different ice particle volume fractions and different ice particle diameters.The experimental and simulation results show that:Firstly,the pressure pulsation in each area of impeller passage increases with the increase of ice particle volume fraction.Secondary,when ice particle volume fractionϕ=0.09,the pressure pulsation in the middle area of impeller has the most significant change.The pressure pulsation increases with the increase of the ice particle volume fraction,the trend of pressure pulsation shows no obvious anisotropy.Lastly,When ice particle diameter d=0.5mm,the pressure pulsation at the impeller outlet increases with the increase of ice particle diameter,and the pressure pulsation at the impeller central region decreases with the increase of ice particle diameter,the pressure pulsation at the volute passage is less affected by the ice particle diameter and increases with the increase of the ice particle diameter.
作者
丁正强
徐立
陈森杨
刘越
熊超
DING Zhengqiang;XU Li;CHEN Senyang;LIU Yue;XIONG Chao(Key Laboratory of High Performance Marine Technology,Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《流体机械》
CSCD
北大核心
2023年第4期58-65,共8页
Fluid Machinery
基金
国家自然科学基金项目(51479125)。
关键词
船用离心泵
冰晶两相流
压力脉动
欧拉-拉格朗日模型
冰粒体积分数
粒径
叶轮
marine centrifugal pump
ice crystal two-phase flow
pressure pulsation
euler-lagrangian model
ice particle volume fraction
ice particle diameter
impeller
