局部起旋器内部旋流特性试验研究  

Experimental study on the characteristics of spiral flow in a local generator

作　　者：李永业[1] 孙西欢[1] 阎庆绂[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《水力发电学报》2011年第2期72-77,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(50579044);山西高校科技研究开发项目(20091008)

摘　　要：螺旋流管道输固在一定程度上可以解决传统管道输送方式存在的高浓度与低能耗的矛盾。起旋器是螺旋流产生的重要装置,采用模型试验与理论分析相结合的研究方法,对其内部的旋流特性进行了研究。结果表明:导流片对流速和涡量变化都有重要影响。导流片附近速度梯度较大;在同一断面,雷诺数相同时,各方向的流速等值线图十分相似,且各方向的流速等值线密集区域都出现在导流片附近;同时随着导叶片的逐渐扭曲,旋涡向圆管中心靠近。其结论对圆管螺旋流输固具有重要的参考价值。Solid materials transport by spiral flow in a pipe can effectively solve in some sense the existing contradiction of high concentration and low energy consumption in traditional pipe transport.In this work,the spiral flow in a local generator,a key device to maintain the spiral system,was studied by a combination of theoretical analysis and model experiments.The research findings show that the generator guide vanes have significant influence on flow rate and vorticity.Velocity gradients vary greatly near the guide vanes.When Re is the same,at the same section the velocity contours of three different flow rates are similar,with contour lines closely clustered around the guide vanes.As the guide vanes are gradually distorted,the vortex is close to the axis of circular pipe.These results provide reference for the study of pipe flow transport of solid materials.

关 键 词：水力学 螺旋流 局部起旋器 导叶 管道 

分 类 号：TV133[水利工程—水力学及河流动力学]