导叶片式旋流器下游断面螺旋流流速特性  

Velocity characteristics of spiral flow in downstream section of guide vane cyclone

作　　者：李永业[1] 高远 贾晓萌[1] 鲁一凡 孙西欢[1] 张雪兰[1] 李锦涛 LI Yongye;GAO Yuan;JIA Xiaomeng;LU Yifan;SUN Xihuan;ZHANG Xuelan;LI Jintao(College of Water Resource Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Shanxi Electric Power Engineering Co.Ltd.,China Energy Engineering Group,Taiyuan,Shanxi 030001,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 [2]中国能源建设集团山西省电力勘测设计院有限公司,山西太原030001

出　　处：《排灌机械工程学报》2020年第8期807-813,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51179116);山西省自然科学基金资助项目(201701D221137)。

摘　　要：将导叶片旋流器作为产生螺旋流的装置,采用理论分析和模型试验相结合的方法,对该旋流器下游断面的螺旋流流速特性进行了研究.研究结果表明:旋流器下游断面流速整体上关于管道圆心呈120°旋转对称分布.从管壁到管道断面中心旋流器下游断面的轴向流速逐渐增大,而周向流速和径向流速则均呈现先增大后减小的变化趋势.最大轴向速度位于管道断面中心处,最大周向流速位于距管壁约1 cm处,最大的径向速度位于距管壁约2 cm处.旋流器导叶片扭转角越大,在下游断面产生的螺旋流的周向流速、强度就越大,螺旋流的影响距离就越远.在距离旋流器导叶片后缘2 m之前,螺旋流衰减较快,且随着旋流器的导叶片扭转角的增大,螺旋流衰减加快.研究成果可为进一步完善螺旋流旋流输送提供理论依据.Spiral flow in the pipe can realize high concentration and low velocity of solid transport.As a device for generating spiral flow,the velocity characteristics of spiral flow in the downstream section of the cyclone were studied by combining theoretical analysis and model test.The results show that the flow velocity of the downstream section of the cyclone presents a symmetrical distribution of 120°about the pipe center.From the wall to the center of the pipe,the axial velocity of the downstream section of the cyclone increases gradually,while the circumferential velocity and radial velocity both increase first and then decrease.The maximum axial velocity is located at the center of the pipe section,the maximum circumferential velocity is about 1 cm away from the pipe wall,and the maximum radial velocity is about 2 cm away from the pipe wall.The larger the torsion angle of the guide vane of the cyclone,the greater the circumferential velocity of the spiral flow generates in the downstream section,the greater the intensity of the spiral flow,and the farther the influence distance of the spiral flow.Before 2m away from the trailing edge of the guide vane of the cyclone,the spiral flow decays faster,and the larger the torsion angle of the guide vane of the cyclone,the faster the spiral flow decays.The results can provide a theoretical basis to further improve the spiral flow transport theory.

关 键 词：旋流器 导叶片 螺旋流 流速特性 

分 类 号：S277.9[农业科学—农业水土工程] TV134.2[农业科学—农业工程]