再论泥沙起动流速  

Incipient Motion of Coarse and Fine Sediment

作　　者：窦国仁[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《泥沙研究》1999年第6期1-9,共9页Journal of Sediment Research

摘　　要：本文是作者４０ 年来研究泥沙起动公式的小结。文中对颗粒间的粘结力、水的下压力和阻力等有关参数进行了修改。通过瞬时作用流速，明确了三种起动状态间的关系，消除了起动切应力和起动流速间的不协调。对导得的起动切应力公式和起动流速公式进行了较为全面的验证，说明公式较好地反映了粗、细颗粒泥沙和轻质沙的起动规律。The author's studies on incipient motion of sediment in the recent 40 years are summarized in the paper. In addition to the gravity, drag and lift, the cohesive force and additional static pressure are considered which are of importance for fine particles. The relations between three stages of incipient motion are defined by using instantaneous velocity. The formulas for initial velocity and critical shear stress are given and examined in all their aspects by the author and other's experiments.

关 键 词：泥沙 起动流速 临界发应力 起动规律 

分 类 号：TV142.1[水利工程—水力学及河流动力学]