圆管螺旋流局部起旋器与出口段流速分布  

Experimental Research on the Local Generator and the Outlet Velocity Distribution of Spiral Flow in Circular Pipe

作　　者：孙西欢[1] 孙雪岚[1] 赵运革 杨世创 

机构地区：[1]太原理工大学建筑与环境工程学院,山西太原030024 [2]山西省运城市水利勘察院,山西运城040004 [3]太原市尖草坪区水利局,山西太原030009

出　　处：《太原理工大学学报》2003年第2期122-125,共4页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目 (9710 3 8)

摘　　要：探讨了圆管螺旋流的局部起旋器 ,并在试验的基础上 ,对圆管螺旋流局部起旋器出口段周向流速和轴向流速分布特性进行了研究 ,同时分析了其形成的机理。研究表明 ,受水流惯性与黏性的作用 ,周向流速分布由部分断面渐变为全断面线性分布 ;轴向流速分布则受周向旋转水流运动作用 ,流速分布坦化为类对数分布。In this paper, the spiral flow local generator is studied,and the distribution of circumferential velocity and axial velocity in outlet section of it in circular pipe are investigated by use of laboratory tests. The mechanism of their a development are analyzed. The research presents that the circumferential velocity distribution is a linear function. With the effect of inertia and viscosity, it gradually becomes whole cross section from partial cross section. The circumferential revolving acts on the axial velocity distribution, and makes it become a similar logarithm distribution. It has important value to study on grain hydrotransport by spiral flow in further.

关 键 词：出口段 圆管螺旋流 局部起旋器 流速分布 泥沙淤积 水库 输沙管道 

分 类 号：TV14[水利工程—水力学及河流动力学]