摘要
水流中泥沙颗粒的跳跃运动是推移质运动的重要形式,根据泥沙颗粒运动过程的受力分析,建立了忽略颗粒旋转和紊动影响的泥沙颗粒跃移运动模型,并采用数值计算方法,求解了跃移运动方程,得到了跃移运动参数(跃移长度、跃移高度、跃移速度)的统计特性,所得结论与实验资料吻合较好;通过对数值计算结果回归分析,得到了跃移运动参数以及输沙率的数学表达式,对于了解推移质运动机理有重要的意义.
Saltation of solid grains is an important form of bed load transport. Force of movement particle was studied and sediment saltation movement model neglecting particle rotation and turbulence effects was established on the basis of the results. Using numerical calculation method to solve the motion equation, get the statistical properties of salta- tion parameters （height of saltation, length of saltation, velocity of saltation）, which agreed well with the previous experimental data. Through regression analysis, the mathematical expressions of saltation parameters and sediment transport rate were obtained, which is very important for studying the mechanics of bed load transport and bed load transport rate
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2012年第3期196-201,共6页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金创新研究群体科学基金资助项目(51021004)
国家自然科学基金资助项目(50979066)
关键词
推移质
跃移
输沙率
bed load
saltation
transport rate
