摘要
针对带跌坎的消力池充水过程水力特性研究偏少的现状,采用水工模型试验研究了带跌坎的消力池充水过程中的流态演变、时均动水压强和脉动压强等。结果表明,随水位抬升该类消力池内交替出现了多种水流流态,在一定条件下会发生水流短暂冲击消力池尾坎的现象;充水过程中,消力池底板时均动水压强可按静水压强分布规律估算;脉动压强均方根受到流态演变的影响,在充水过程中随水深增加而呈现不同的变化规律。
There are little data reported about the hydraulic characteristics of stilling basin with drops during water filling process. The hydraulic model test is conducted to study the evolution of flow pattern, time-average dynamic water pressure and fluctuating pressure. The results show that the various flow patterns are alternating occurrence with the rising of water level in the stilling basin with drops; the surface flow impacts the stilling basin tail transiently under the special condition. The time-average pressure on the floor of stilling basin can be calculated with distribution rule of static pressure; the evolution of flow pattern results in the change law of the root mean square fluctuating pressure with the rising water depth.
出处
《水电能源科学》
北大核心
2011年第10期43-46,共4页
Water Resources and Power
基金
国家自然科学基金资助项目(50978173)
四川大学青年教师科研启动基金资助项目(2009SCU11072)
"十一五"国家科技支撑计划基金资助项目(2008BAB29B04)
关键词
水力特性
跌坎消力池
流态
脉动压强
hydraulic characteristics
stilling basin with drops
flow pattern
fluctuating pressure
