不同荷载管道车弯管启动时环隙流场数值模拟  

Numerical Simulation of Annulus Flow Field of a Pipeline Truck Under Different Loads when Starting Horizontal Bend

作　　者：王成 孙西欢[1] 李永业[1] WANG Cheng;SUN Xi-huan;LI Yong-ye(College of Hydro Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《水电能源科学》2023年第11期91-94,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51179116)。

摘　　要：为研究不同荷载条件下管道车在弯管启动时环隙流场的分布,采用数值模拟结合物理模型试验验证的方法研究不同荷载管道车水平弯管启动时环隙流场。结果表明,荷载的增加不会改变缝隙流场流速的整体分布规律,仅仅改变缝隙流场流速数值的大小;不同荷载条件下,水平弯管内管道车缝隙流场轴向流速从管道内壁到管道车外壁有先增大后减小的规律。周向流速在管道车缝隙流入口断面处和车中断面处分布较为均匀,但在缝隙流出口断面处出现密封盖两侧流速相反分布。径向流速越远离支撑体和密封盖分布越均匀,且在管道车缝隙流出口断面支撑体处出现流速明显增大现象。该研究解释了环状缝隙流场分布规律形成原因,获得了不同荷载管道车在弯管处启动时缝隙流场的流速分布规律。在完善丰富环状缝隙流理论的同时,为筒装料管道水力输送的应用提供了理论依据。In order to study the distribution of the annular gap flow field during the bend start of the pipeline vehicle under different loading conditions.Numerical simulation combined with physical model test verification was used to study the annular gap flow field during the horizontal bend start of duct trucks with different loads.The results show that the increase of load does not change the overall distribution of the gap flow field velocity,but only changes the magnitude of the gap flow field velocity;Under different loading conditions,the axial flow velocity of the gap flow field of the pipe vehicle in the horizontal bend has the law of increasing and then decreasing from the inner wall of the pipe to the outer wall of the pipe vehicle.The circumferential flow velocity is more uniformly distributed at the section of the pipe vehicle gap inflow port and the section in the vehicle,but the opposite distribution of flow velocity on both sides of the sealing cover appears at the section of the gap flow outlet.The radial flow velocity is more uniformly distributed as far away from the support body and the seal cover,and the flow velocity increases significantly at the support body in the slit flow outlet section of the pipeline vehicle.This study explains the reasons for the formation of annular gap flow field distribution law and obtains the flow velocity distribution law of the gap flow field when the pipe vehicle is started at the bend with different loads.While improving and enriching the theory of annular gap flow,it provides theoretical basis for the application of hydraulic conveying in cartridge loading pipeline.

关 键 词：管道车 筒装料 环隙流场 数值模拟 

分 类 号：TH137[机械工程—机械制造及自动化] TV134.1[水利工程—水力学及河流动力学]