Study on Influence of the Shape of Permeable Spur Dike on Flow Characteristics Near the Dam Body
To further explore the influence of the permeable hole type of permeable spur dike on the water flow char-acteristics,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 turbu-lence intensity is.The slow flow effect of the permeable spur dike is closely related to the permeable hole type.The slug-gish 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.
permeable spur dikepermeable hole typeflow velocity distributionturbulence intensitysluggish flow ratio
万方数据
维普
