摘要
为防止挖泥船施工中泥浆泵能耗高、输送阻力大和排泥管道淤堵,以水平管道中泥浆流动过程为研究对象,采用以颗粒动力学为基础的欧拉双流体模型,对水平管道中泥浆输送的固液两相流进行了CFD数值模拟,并与Durand模型的计算值和文献中的试验数据进行了对比。结果表明:数值模拟得到的计算结果与实测值表现出良好的一致性;在管道内充分发展段,管道截面的垂直中心线上颗粒浓度呈不对称分布,并且不对称度随着颗粒浓度增大或泥浆流速变大而降低;粗颗粒在管道底部由于受到升力作用,因此其浓度曲线在管道底部近壁处出现反折;CFD模型得到的压降计算值较Durand模型更接近实测值。
In order to prevent high energy consumption of the pump,large conveying resistance and pipeline jam during the construction of dredger,anEulertwo fluid model was developed based on the kinetic theory of granular to simulate the two-phase(slurry)f ow through pipeline.The simulation resultsobtained using the CFD model,were compared with the results giving by Durand model and experimentaldata available in the literature.The results indicate that the CFD predicted results are in good agreement with the experimental data.In the fully developed part of the pipe,the solid concentration profile is asymmetric across vertical center line,and the degree of asymmetry decreases with the increase of particle concentration or the velocity of slurry.A reversal in the concentration profile of coarse particle is seen near the bottom of the pipe,because of the near-wall lift force.The present CFD model gives better predictions for pressure drop than the Durand model.
作者
熊庭
张梦达
危卫
安邦
XIONG Ting;ZHANG Mengda;WEI Wei;AN Bang(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《人民黄河》
CAS
北大核心
2018年第4期19-23,共5页
Yellow River
基金
国家自然科学基金资助项目(51679178)
