不同距径比下管道后车环隙螺旋流脉动强度特性  

Fluctuation Intensity Characteristics of Concentric Annular Slot Spiral Flow around Rear Piped Carriage’s Body with Different Spacing-Diameter Ratios

作　　者：吴剑 刘亚坤 孙西欢[2,3] 李永业[2] 张帝 杨姣 WU Jian;LIU Ya-kun;SUN Xi-huan;LI Yong-ye;ZHANG Di;YANG Jiao(Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China;School of Hydroscience & Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Jinzhong University, Jinzhong 030600, China)

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]太原理工大学水利科学与工程学院,太原030024 [3]晋中学院,山西晋中030600

出　　处：《长江科学院院报》2021年第8期78-83,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51109155,51179116,51909024);山西省自然科学基金项目(2015011067);辽宁省自然科学基金项目(20180540132);中央高校基本科研业务费专项(DUT17RC(3)100);大连理工大学重点实验室科研专题基金项目(DUT19LAB35)。

摘　　要：筒装料管道水力输送是现代物流业中出现的一种新型物料运送方式,有着特殊的优势。通过模型试验的方法,对管道双车在不同距径比SD条件下后车所形成的同心环隙螺旋流的轴向、垂向、横向速度脉动强度分布特性进行了研究。结果表明:随着SD的增加,轴向、垂向和横向速度脉动强度的平均值、极差基本保持稳定,标准差、变异系数呈现减小的变化规律;垂向速度脉动强度特征与横向的相似;无论在何种SD条件下,垂向和横向速度脉动强度都比轴向脉动强度小1个量级,但其变异系数大约为轴向的3倍;管道双车合理距径比为5~7。研究结果可为此技术的工程实际应用提供参考。Pipeline hydraulic conveyance of tube-contained raw-material is a new type of material transportation method which appears in modern logistics industry and has special advantages.In this paper,the distribution characteristics of fluctuation intensity of axial,vertical and lateral velocities of concentric annular slot spiral flow formed by double-piped carriages with different spacing-diameter ratios(SD)are studied by means of model test.Results reveal that with the increase of SD,the average value and range of fluctuation intensity of axial,vertical and lateral velocities remain basically stable,while the standard deviation and variation coefficient decrease.The characteristics of fluctuation intensity of vertical and lateral velocities are similar.Regardless of the SD,the fluctuation intensities of vertical and lateral velocities are smaller than that of axial velocity by one order of magnitude,but the variation coefficient is about three times that of axial velocity.The reasonable spacing-diameter ratio of the double-piped carriages is 5-7.The research result is of referential value for the engineering application of tube-contained raw-material pipeline hydraulic conveyance.

关 键 词：管道水力输送 环隙螺旋流 速度特性 脉动强度 距径比 

分 类 号：TV134.2[水利工程—水力学及河流动力学]