摘要
为深入了解透水孔布置方式对坝体作用区水流特性的影响,通过室内水槽试验,采用多普勒流速仪(ADV)测量了5种透水孔布置方式下透水丁坝附近水流的三维瞬时流速,分析了坝体周围水流流速和紊动特性的分布规律。试验结果表明,透水孔布置方式对坝后水流特性的影响明显大于坝前;透水孔布置方式为栅格型布置时,缓流效果和流速均匀性较好,缓流率达到36.09%,三层布置方式次之,单层布置方式较差;随着与透水丁坝距离的增加,坝后回流现象减弱,透水孔布置方式对水流特性的影响逐渐消失。研究结果可为透水丁坝的结构优化和工程应用提供参考。
In order to deeply understand the influence of the arrangement of permeable holes on the flow characteristics near the dam body,the three-dimensional instantaneous flow velocity of the flow near the permeable spur dike with five kinds of arrangement of permeable holes was measured by Doppler velocimeter(ADV)through indoor flume test.The distribution law of flow velocity and turbulence characteristics around the dam body was analyzed.The test results show that the influence of the arrangement of the permeable holes on the flow characteristics behind the dam is signifi-cantly greater than that in front of the dam.When the arrangement of permeable holes is grid type,the slow flow effect and velocity uniformity are better,and the slow flow rate reaches 36.09%.The three-layer arrangement is the second,and the single-layer arrangement is poor.With the increase of the distance from the permeable spur dike,the backflow phenomenon behind the dam is weakened,and the influence of the arrangement of the permeable holes on the flow characteristics gradually disappears.The research results can provide reference for structural optimization and engineering application of permeable spur dikes.
作者
樊新建
程扬威
张永明
贾昊
王彦虎
李拙
浮文文
FAN Xin-jian;CHENG Yang-wei;ZHANG Yong-ming;JIA Hao;WANG Yan-hu;LI Zhuo;FU Wen-wen(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《水电能源科学》
北大核心
2024年第12期204-208,共5页
Water Resources and Power
基金
国家自然科学基金项目(513798128)
甘肃省自然科学基金项目(21JR7RA238)
甘肃省水利科学试验研究及技术推广项目(甘水建管发[2020]46号第70,23GSLK038,23GSLK039)。
关键词
透水丁坝
透水孔布置方式
流速分布
紊动强度
缓流率
permeable spur dike
permeable hole arrangement
flow velocity distribution
turbulence intensity
sluggish flow ratio
