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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。
The influence of the curve flow on the bed topography becomes more complicated, and the different boundary of the terrain changes the structure of the water flow obviously. Through the water and scouring test of the U-shaped bend flume, the analysis of the water surface horizontal gradient, the distribution of vw velocity field, the distribution of vorticity and the variation of vortex flux along the curve show that the distribution characteristics of section circulation, There is a strong correlation between circulation evolution and bed topography. It provides a scientific basis for further exploration of the evolution and development of the second-order flow and its interaction with the bed topography.