水平弯管内浆体输送特性的数值模拟  

Numerical Simulation of Slurry Flow in Horizontal Bend

作　　者：张梦达 熊庭[1] 危卫[1] 范世东[1] 温泉 ZHANG Meng-da;XIONG Ting;WEI Wei;FAN Shi-dong;WEN Quan(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Yangtze River Waterway Research Institute,Wuhan 430011,China)

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]长江航道规划设计研究院,武汉430011

出　　处：《船海工程》2018年第3期169-173,共5页Ship & Ocean Engineering

基　　金：国家自然科学基金(51679178)

摘　　要：为获得复杂地理条件下管道中固液浆体输送的流动特性及局部阻力损失特性,采用CFD方法建立数值模型,对直管、90°弯管、180°弯管、S形弯管内固液两相流动进行模拟,并将计算结果与文献中实验数据进行对比。结果表明,数值模型得到的计算值与实验值有良好的一致性,在弯管入口处高流速区域靠近管道内侧,沿着流动方向逐渐向管道外侧偏移,对于同一工况,管道局部阻力系数大小依次为180°弯管、S形弯管、90°弯管,且局部阻力系数随流速减小或浆体浓度增加而变大。In order to gain the flow characteristics and local resistance coefficients of solid-liquid two-phase flow in pipeline under complicated geographical conditions,the mathematical model was built using CFD method to simulate the flow of slurry in straight pipe,90° bend,180° bend,s-like bend. The modeling results were compared with the experimental data available in literatures,showing that the model predictions are well agreed with the experimental data. At the entrance of the bend,the high velocity region is near the inner side of the pipe,and it moves towards the outer side of the pipe along the flow direction. For the same working condition,local resistance coefficients of bends show the law： 180° bend s-like bend 90° bend,and it increases with decrease in flow velocity or increase in slurry concentration.

关 键 词：管道输送 固-液两相流 数值模拟 弯管 阻力系数 

分 类 号：U664.84[交通运输工程—船舶及航道工程]