摘要
采用CFD软件中的混合两相流模型、标准的k-ε湍流模型及SIMPLE算法,对地下管道挖掘机泥水系统中泥浆管内部流场进行数值模拟,揭示泥浆管内的压力与速度分布情况,结果表明在弯管处压力分布复杂,速度较大,对管道冲击力大,易损坏。并分析了不同入口速度、不同弯曲半径、不同颗粒体积浓度及不同水平长度对流体流动的影响。分析结果对管道的优化及延长管道寿命具有一定的指导意义,为泥水系统中泥浆泵的选型及施工时泥浆泵的控制提供参考。
Based on mixture two-phase flow model of the CFD software,the standard turbulence model and the SIMPLE algorithm,numerical simulation of the flow field in the slurry pipe of underground pipe excavator is conducted so as to reveal the distribution situation of pressure and velocity inside the mud pipe. The results show that the pressure distribution in the bend is complicated,the speed is large,and the impact force is large and easy damaged. The effects of different inlet velocity,different bending radius,different particle volume concentration and different horizontal length on the fluid flow are analyzed. The analysis results has certain guiding significance for optimizing the pipeline and extending the service life of pipeline,so they can provide references for the mud pump selection and the control of slurry pump during the construction.
出处
《机械研究与应用》
2018年第1期42-46,共5页
Mechanical Research & Application
关键词
泥水系统
泥浆管
数值模拟
多相流模型
slurry system
mud pipe
numerical simulation
multiphase flow model
