孙东坡弯道环流公式改进  

Improvement of Sun-Dongpo formulation for circulation in bends

作　　者：马国淇 黄赛花[2] 欧剑[2] 

机构地区：[1]浙江大学港口海岸及近海工程研究所,浙江杭州310058 [2]浙江水利水电学院水利与环境工程学院,浙江杭州310018

出　　处：《水运工程》2016年第4期25-28,共4页Port & Waterway Engineering

基　　金：浙江省科技厅优先主题重点社会发展项目(2009C13016)

摘　　要：孙东坡弯道环流流速公式结构简明、形式合理、不受卡门常数影响,且与实验室资料有良好的拟合性。但在横比降的计算和普朗特紊流切应力的构架方面存在着缺陷,使得公式不能很好地反映出粗糙床面的实际情况。针对上述问题,引入与实际情况相符的罗索夫斯基横比降公式,重新构架了普朗特紊流切应力方程。改进公式不仅改善了原公式中存在的问题,而且计算值与实测值吻合度非常好,可应用到实际的弯道流速计算中去。The formulation of circulation velocity by Sun-Dongpo has a concise and reasonable structure, and the results won＇t be affected by Karman＇s constant and the agreement is acceptable with the experimental findings. But the actual situation of the rough bed can＇t be reflected, for the inadequacy in the calculation of transverse slop and the establishment of prandtl＇s turbulent stress. For the problems mentioned above, we imported Rozocskii＇s formulation of transverse slop which fitted well with the real situation, built the Prandtl＇s turbulent stress, and then joined them together to get the improved formulation. Not only did the improved formulation correct the defect in the usual one, but also the results matched very well with the real data, so the improved formulation could be put into use in natural bends.

关 键 词：弯道环流 孙东坡公式 横比降 普朗特紊流切应力 

分 类 号：TV143[水利工程—水力学及河流动力学]