常曲率U型弯道水流紊动特性试验研究

Experimental study on turbulence characteristics of U-shaped bend flow with constant curvature

采用三维声学多普勒流速仪,对水流三维流速进行了采集,对弯道水流的脉动进行了统计分析,研究了典型断面的紊动强度、紊动切应力、紊动能的分布。试验结果能够很好的揭示弯道水流的三维特性及分布规律。研究成果为进一步研究水流的紊动结构及泥沙的运动机理提供了参考资料。

3 -D flow velocity data is collected with Acoustic Doppler Velocimetry（ ADV）, and then a statistic analysis is made on the fluctuation of the bend flow for studying the distributions of the turbulence intensity, turbulence shear stress, turbulence kinetic energy within a typical section. The experiment result can better reveal the 3 - D characteristics and the distribution law of the bend flow. This study result provides references for the further study on the turbulent structure of flow and the mechanism of sediment movement.