摘要
本实验以曲线型交汇口弯道防护为出发点,研究挑角不同时丁坝群对曲线型交汇口弯道的影响。以曲线型交汇口弯道中布置丁坝群为研究对象,采用物理模型试验,主要分析非淹没丁坝在相同流量、不同挑角工况下对曲线型交汇口处弯道自由水面形态、纵向流速分布、纵向紊动强度分布的影响。研究表明,在弯道凹岸布置丁坝群后,可以束窄水流,调整、优化流速分布,改变弯道水流的自由水面形态。当丁坝挑角改变时,对弯道防护也在改变,探究出在丁坝挑角约为45°时对弯道的保护达到最优。
The topics that the intersection of the curved corners of the mouth was guarded as a starting point, the pick angles of different spur dike groups have an important influence for the corners of the type curve distribution, the research was based on the spur dike groups layout for the corners of the type curve distribution, the physical model tests were used, the non - submerged groyne at the same level was analyzed, the free water surface morphology of the corners of the type curve distribution, longitudinal velocity distribution, vertical turbulence intensity distribution under the different pick angles condition also were analyzed, the study results indicated that the spur dike groups were layout concave bank, the spur dike groups can narrow beam currents, adjust and optimize the velocity distribution, changes the free water surface morphology of the corners. Once the spur dike pick angles were changed, the protection of the corners also were changed, It is the optimal for defending the corners when the pick angle is 45 degree.
出处
《水利科技与经济》
2015年第3期36-39,共4页
Water Conservancy Science and Technology and Economy
关键词
曲线型交汇
丁坝群
挑角
流速
corners of the type curve
spur dike group
pick angle
flow velocity
