摘要
弯道水流受床面地形的影响变得更加复杂,不同的地形边界使水流结构发生明显的改变。通过U形弯道水槽清水及冲刷试验,分析了弯道水面横比降、断面v-w流速场分布、断面涡量分布及涡通量沿程变化,发现断面环流分布特性、沿程变化趋势以及断面环流演化过程与床面地形之间存在较强的相关性。为深入探讨弯道二次流的发展演化及其与床面地形的相互影响提供了科学依据。
Bend flow becomes complex due to the influence caused by bed topography.Significant changes happen to flow structure on different terrain boundaries.Based on the flume experiment,the transverse water surface slop,the v-w flow vector field,the vorticity on cross-sections and the evolution of vortex flux are analyzed.The distribution characteristics and evolution trends of secondary flow distribution and the interrelation between secondary flow evolution and bend topography are described.The results are favorable to further know the interaction between the secondary flow and bed topography in channel bends.
出处
《水电能源科学》
北大核心
2014年第11期104-106,共3页
Water Resources and Power
基金
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2013-24
HKY-JBYW-2013-14)
关键词
弯道二次流
床面地形
环流强度
涡量
断面形态
试验研究
bend secondary flow
river bed terrain
circulation intensity
vorticity
section morphology
experimental study
