长江科学院院报2017，Vol.34Issue(12)：44-47,4.DOI:10.11988/ckyyb.20160864
窄缝挑坎水翅轨迹及降雨特性研究
Water-wing Trajectory and Characteristics of Rainfall in Slit-type Bucket
摘要
Abstract
Rare research has been reported on the water-wing in slit-type bucket caused by contracted sidewall which poses a threat on bank slope stability.In this article,a physical model is setup to investigate into the relation between the type of bucket (contraction ratioβ and bucket angle θ) and the characteristic of water-wing for revealing the motion law of water-wing in slit-type bucket and the distribution characteristic of rainfall intensity formed by the water-wing near downstream.Results show that along with the decreasing of contraction ratio,the water-wing is ejected higher,and at the same time,the scope of rainfall is larger and its location is closer to the outlet;whereas along with the decreasing of bucket angle,the water-wing trajectory doesn't change obviously,but the lateral diffusion aggravates,resulting in the increase of rainfall range.On this basis,a concept of secondary water-wing lateral diffusion coefficient is proposed to predict the shape and scope of rainfall caused by secondary water-wing in different slit-type buckets.The research results could enrich the research contents of slit-type bucket,expand research range,and provide more theory foundation for design.关键词
窄缝挑坎/水翅/降雨强度/收缩比/挑角Key words
slit-type bucket/water-wing/rainfall intensity/contraction ratio/bucket angle分类
建筑与水利引用本文复制引用
黄国兵,杜兰,王才欢,聂艳华..窄缝挑坎水翅轨迹及降雨特性研究[J].长江科学院院报,2017,34(12):44-47,4.基金项目
国家重点研发计划项目(2016YFC0401904) （2016YFC0401904）
国家自然科学基金项目(51279013,51379020) （51279013,51379020）
中央级公益性科研院所基本科研业务费专项(CKSF2013023/SL,CKSF2014047/SL) （CKSF2013023/SL,CKSF2014047/SL）
