南水北调与水利科技2011，Vol.9Issue(6)：119-122,4.DOI:10.3724/SP.J.1201.2011.06119
跌坎消力池水力特性试验研究
Hydraulic characteristics of the Stilling Basin with Drop Sill
摘要
Abstract
In order to study the hydraulic characteristics of the stilling basin with drop sill, the underflow speed, time-average pressure, fluctuating pressure, and integral scale in space in the stilling basin with and without drop sill are compared based on a hydraulic modelling test within a scale of 1 : 50 from an engineering project Comparing the stilling basin with drop sill to that without drop sill,the maximum underflow speed decreases by 38. 5%,the peak time-average pressure decreases by 30%,the peak fluctuating pressure decreases by 50%, and the minimum integral scale in space decreases by 75%. With the increasing flow rate into the stilling basin with drop sill, the variations of the above four indexes show an increasing tendency. In terms of the safety of the slab, the stilling basin with drop sill shows a better applicability than that without drop sill.关键词
水力学/跌坎消力池/临底流速/冲击压强/脉动压强系数/空间积分尺度/流能比Key words
hydraulics/stilling basin with drop sill/underflow speed/impact pressure/the coefficient of fluctuating pressure/spatial integral scale/ ratio of flow rate and water head分类
建筑与水利引用本文复制引用
秦翠翠,杨敏,董天松..跌坎消力池水力特性试验研究[J].南水北调与水利科技,2011,9(6):119-122,4.基金项目
国家自然科学基金项目(51179119) （51179119）
