水资源与水工程学报2015，Vol.26Issue(5)：147-150,155,5.DOI:10.11705/j.issn.1672-643X.2015.05.29
跌坎对消力池水力特性影响的试验研究
Experiment on influence of falling-still on hydraulic characteristics in dissipation basin
摘要
Abstract
In order to study the effect of falling -still in dissipation of bottom flow ,the paper studied the influence of falling -still on flow pattern , underflow velocity and fluctuating pressure based on a hydraulic model test from a project .Results show that when the flow is constant , the flow pattern in the dissipation basin would evolve from bottom flow to submerged admixture flow as well as surface flow with the increase of falling-still height.The falling-still can reduce the underflow velocity in first half of the stilling ba-sin, and the higher the height of falling -still, the more the decrease of maximum underflow velocity;and in the second half of the stilling basin , the falling-still has hardly effect on underflow velocity .The falling-still also has a crucial influence on fluctuating pressure , with the increase of falling -still hieght , the maximum fluctuating pressure increases first and then decreases .Along the flow direction of stilling basin , the fluctuating pressure and the underflow velocity increase first and then decrease and the position of their maximum values is in the same region .关键词
底流消能/跌坎高度/流态/临底流速/脉动压强/模型试验Key words
hydraulic jump dissipation/height of falling-still/flow pattern/underflow velocity/fluctu-ating pressure/model test分类
建筑与水利引用本文复制引用
张慧,杨敏,李会平..跌坎对消力池水力特性影响的试验研究[J].水资源与水工程学报,2015,26(5):147-150,155,5.基金项目
国家自然科学基金项目(51179119) （51179119）
国家自然科学基金创新研究群体科学基金(51021004) （51021004）
