弯道横向流动与输沙的探讨

本文由紊流雷诺方程出发,采用普朗特紊流切应力构架和通过因次分析确定的掺长形式,探讨了弯道恒定二元环流的流速分布。导出的环流流速分布公式结构比较简明、合理,与实测资料有较好的拟合性.同时利用环流流速分布公式,进一步探讨了弯道水流中泥沙的横向输移问题,建立了便于数值模拟的计算模式。

Study of Circulating Velocity Profile and Lateral Silt Discharge in Curved Channels

In this paper, the structure of Prandtl Turbulent Stress and forms of mixed length de- tormined through dimensional anaiysis, a steady 2-D circulating velocity profile in curved channels is studied based on Reynolds Turbulent Equation. The derived oformula for circu- lating the velocity profile has a simple and reasonable structure, and coincides with the sur- vey data. In this paper we have aiso studied the lateral silt discharge in curved channels and have discovered an available model for numerical analogue of curved channels.