弯道环流流速与泥沙横向输移研究  

Study of circulating velocity profile and lateral sediment transport in curved channels

作　　者：孙东坡[1] 朱岐武[2] 张耀先[2] 张晓松[1] 

机构地区：[1]华北水利水电学院水利系,河南郑州450045 [2]黄河水利职业技术学院,河南开封475001

出　　处：《水科学进展》2006年第1期61-66,共6页Advances in Water Science

基　　金：国家自然科学基金资助项目(50279009)

摘　　要：根据弯道水流特性,分析了断面环流的运动方程,采用普朗特紊流切应力构架建立了横向水流切应力的形式。通过对掺长形式的分析,给出了断面环流横向水流切应力沿垂线表达式,进一步建立了弯道恒定二元环流的横向流速分布公式。经对比分析与资料验证表明,导出的环流流速分布公式结构简单、合理,与资料有较好的拟合性。同时,利用导出的环流流速分布公式,还研究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。In this paper, the circulating flows in the section is analyzed based on the characteristics of the curved channels. The forms of horizontal turbulent stress is established by the Prandtl turbulent stress. A formula for steady 2-D circulating velocity profile in curved channels is derived based on the Reynolds Turbulent equation. The analysis indicates that formula has a simple and reasonable structure, and coincides with the survey data. We also study the lateral silt discharge in the curved channels and discover an available model for numerical simulation of the curved channels.

关 键 词：横比降 环流流速 掺长 紊动扩散 横向输沙率 

分 类 号：TV133.2[水利工程—水力学及河流动力学] TV143.1