透水丁坝孔型对坝体附近水流特性影响研究  

Study on Influence of the Shape of Permeable Spur Dike on Flow Characteristics Near the Dam Body

作　　者：樊新建[1] 浮文文 王之君[1] 汪开宏 程扬威 FAN Xin-jian;FU Wen-wen;WANG Zhi-jun;WANG Kai-hong;CHENG Yang-wei(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou New Area Water Affairs Management Investment Group Co.,Ltd.,Lanzhou 730300,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州新区水务管理投资集团有限公司,甘肃兰州730300

出　　处：《水电能源科学》2024年第3期204-207,199,共5页Water Resources and Power

基　　金：国家自然科学基金项目(42167043);甘肃省自然科学基金项目(21JR7RA238);甘肃省科技计划(技术创新引导计划)项目(21CX6ZA159)。

摘　　要：为深入探讨透水丁坝透水孔型对其附近水流特性的影响,通过室内高精度水槽试验,采用三维声学多普勒流速仪对矩形、方圆形和椭圆形三种透水孔型下丁坝附近水流流速进行测量,获得不同透水孔型影响下的丁坝附近水流流速和紊动强度分布特征。结果表明,坝后水流流速波动和紊动强度明显大于坝前,透水丁坝对近坝区水流影响较大,距丁坝越远,流速均匀性越好,紊动强度越小。透水丁坝的缓流效果与透水孔型密切相关,矩形透水孔的坝后缓流率为35.4%,缓流效果较好,方圆形透水孔次之,椭圆形最小,研究结果可为丁坝的透水孔型选择提供指导和参考。To further explore the influence of the permeable hole type of permeable spur dike on the water flow characteristics,based on the high-precision flume experiment,the three-dimensional velocity of water flow near the spur dike with different permeable holes was measured by the ADV,and the distribution law of velocity and turbulence intensity on the typical section was analyzed.The results show that the flow velocity fluctuation and turbulence intensity behind the dam are obviously larger than those in front of the dam.The permeable spur dike has a great influence on the water flow near the dam.The farther away from the spur dike is,the better the flow velocity uniformity is,and the lower the turbulence intensity is.The slow flow effect of the permeable spur dike is closely related to the permeable hole type.The sluggish flow ratio behind the dam of the rectangular permeable hole is 35.4%,and the slow flow effect is better.The square and circular permeable holes take second place,and the elliptical ones are the smallest.The research results can provide guidance and reference for the selection of permeable hole type of spur dike.

关 键 词：透水丁坝 透水孔型 流速分布 紊动强度 缓流率 

分 类 号：TV132.1[水利工程—水力学及河流动力学] TV863