Division and flow scale investigation of circulation zone around spur dike
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摘要: 通过三维激光颗粒动态分析仪(3D-PDA)对玻璃水槽内丁坝回流区的流速进行测量,获得了回流区流速分布的详细资料。根据流量连续原理和回流区流速分布,对丁坝回流区进行了区域划分:沿横向划分为负流速区、正流速区和主流区;沿纵向分为回流减流区和回流增流区。在此基础上进一步研究了回流尺度和回流流量沿纵向的变化规律。结果表明,回流区正负流区流量沿纵向呈纺锤形分布,负流速区和回流区的宽度在纵向基本呈线性变化。Abstract: The velocity distribution in the circulation zone around the spur dike is studied by 3D-PDA in the water tank in this paper.According to the distribution characteristic of the velocity and the flux,the general flow field can be divided into three regions in the transverse direction: the reverse-velocity backflow region,the positive-velocity backflow region and the main flow region; and two regions in longitudinal direction: the reverse flow velocity-increasing region and the reverse flow velocity-decreasing region.The longitudinal variation of the each region is also studied,which shows that the width of the negative velocity area and the circulation flow area changes linearly in the longitudinal direction.
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Key words:
- spur dike /
- partit ion of backflow region /
- scale of backflow region /
- flow /
- flow experiment
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[1] 吕志泳,张柏山,祝立国.三个丁坝流态研究[J].流体力学试验与测量,2002,16(2):21-24.(LU Zhi-yong,ZHANG Bai-shan,ZHU Li-guo.Study on flow patterns over spurdikes[J].Experiments and Measurements in Fluid Mechauies,2002,16(2):21-24.(in Chinese)) [2] WU Bao-sheng,WANG Guang-qian,MA Ji-ming.Case study:River training and its effects on fluvial processes in the lower Yellow river China[J].Journal of Hydraulic Engineering,2005,131(2):85-96. [3] KUHNLE R A,ALONSO C V,SHIELDS Jr F D.Local scour associated with angled spur dikes[J].Journal of Hydraulic Engineering,2002,128(12):1087-1093. [4] KUHNLE R A,ALONSO C V,SHIELDS Jr F D.Geometry of scour holes associated with 90 spur dikes[J].Journal of Hydraulic Engineering,1999,125(9):972-978. [5] 马永军,陈稚聪,丁翔.吸、喷水法减小丁坝下游回流尺度的实验研究[J].水科学进展,2003,14(6):763-768.(MA Yong-jun,CHEN Zhi-cong,DING Xiang.Experimental study on reducing the size of circulating region in the downstream of spur dike[J].Advancesin Water Science,2003,14(6):763-768.(in Chinese)) [6] 陆永军,周耀庭.丁坝下游恢复区流场初探[J].水动力学研究与进展,1989,4(3):70-78.(LU Yong-jun,ZHOU Yoo-ting.Studyon velocity field near redeveloping region behind groin-like structures[J].Journal of Hydrodynamics,1989,4(3):70-78.(in Chinese)) [7] TANG Xue-ling,DING Xiang,CHEN Zhi-cong.Large eddy simulations of three-dimensional flows around a spur dike[J].Tsinghua Science &Technololgy,2006,11(1):117-123. [8] DUAN Jennifer G,NANDA S K.Two-dimensional depthaveraged model simulation of suspended sediment concentration distribution in a groynefield[J].J hrdrlogy,2006,327:426-437. [9] 周宜林.淹没丁坝附近三维水流运动大涡模拟[J].长江科学学院院报,2001,18(5):28-31.(ZHOU Yi-lin.Division mechanismand flow scalo investigation of circulation zone around spur dike[J].Yangtze River Scientific Research Institute,2001,18(5):28-31.(inChinese)) [10] 乐培九,李旺生,杨细根.丁坝回流长度[J].水道港口,1999,(2):3-9.(YUE Pei-jiu,LI Wang-sheng,YANG Xi-gen.Length of whirlpool flow behind dikes[J].Journal of Waterway and Harbor,1999,(2):3-9.(in Chinese)) [11] 李国斌,韩信,傅津先.非淹没丁坝下游回流长度及最大回流宽度研究[J].泥沙研究,2001(6):68-73.(LI Guo-bin,HAN-Xin,FU Jin-xian.Study on the length and maximum width of the circulating region caused by a dike[J].Journal of Sediment Research,2001(6):68-73.(in Chinese)) [12] 杨元平.透水丁坝坝后回流区长度研究[J].水运工程,2005(2):18-21.(YANG Yuan-ping.On the length of circulation region ofseepage spur dike[J].Port & Waterway Engineering,2005(2):18-21.(in Chinese)) -
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