Vortex Formation with Free Surface Variation in Shear Layer of Open Channel Flows near Abrupt Expansion
Vortex Formation with Free Surface Variation in Shear Layer of Open Channel Flows near Abrupt Expansion
复制标题
明渠流近突变膨胀剪切层自由液面变化的涡形成
DOI：
10.2208/prohe.37.463
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
I. Kimura
中科院分区：
文献类型：
--
作者：
T. Hosoda;I. Kimura
本文用平面二维浅水方程组研究了明渠水流剪切层中旋涡随自由液面变化的形成。本文首先对双曲正切型速度剖面进行了无粘不稳定性分析，以确定自由边界层中旋涡形成方程的适用性。然后，对突扩明渠平面二维流场进行了数值模拟。本文给出了有关旋涡形成的一些数值结果（速度矢量、深度等值线等）。的时间速度变化和旋涡脱落过程之间的关系。
The vortex formation with the free surface variation in the shear layer of open channel flows is investigated by means of the plane-2D-shallow water equations. The invisid instability analysis of the tanhtype velocity profile is firstly shown in order to make sure the applicability of the equations for the vortex formation in a free boundary layer. Then, the numerical simulation is made for the plane 2D-flow domain of open-channels with an abrupt expansion. Some numerical results conserning the vortex formation (velocity vectors, contour lines of depth etc.) are shown indicating the relation between the temporal velocity variations and the vortex shedding processes.