摘要
根据试验结果,通过理论分析,研究了开敞水域中水流斜跨挖槽时的水流结构,探讨了挖槽内流速变化的规律,得出了挖槽内水深比、流速比和斜跨水流交角、边坡的关系曲线.文中还利用量纲分析,导出了挖槽中心垂线平均流速折减系数的经验公式.分析了挖槽内底流速的变化特点,从而为挖槽内泥沙的输移强度的估计及挖槽的选线设计提供了依据.
Based on physical model tests and theoretical analysis, this paper has studied the flow structure in a dredged channel with the flow across the trench at an oblique angle to the main flow direction in open water. The regularity of the variation of velocity in the dredged channel is discussed as well. Based on the experimental results, groups of curves such as depth ratio and velocity ratio versus oblique angle and side slope have been plotted to show the variation of volocity in the dredged channel. An empirical formula of depth-averaged velocity is derived by means of dimensional analysis, and at the same time the characteristics of the variation of bottom current velocity are described. Therefore, a basis is provided for estimating the intensity of sediment transport and selecting a proper direction for a dredged channel.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1993年第1期31-38,共8页
Journal of Hohai University(Natural Sciences)
关键词
挖槽
流速
回淤
水域
试验
drdged channel
current velocity
flume experiment
siltation
