| 摘要: |
| 在水槽中进行概化试验,采用三维声学多普勒测速仪(ADV)测量圆端形桥墩周围三维流场及紊动强度分布.分析有桥墩时的紊流强度垂向分布及有、无桥墩时紊流强度比值的横向分布变化,分析结果表明,垂线上紊流强度最大位置在0～0.2 h与0.8h～1.0h两个区间,桥墩对紊流强度的变化影响存在极值,极值大小和出现位置与流速有关,流速越大,极值越大,且极值位置与桥墩的距离也越大.根据极值出现位置离桥墩距离确定紊流宽度,给出了桥墩紊流宽度与弗汝德数的关系. |
| 关键词: 紊流强度 紊流宽度 圆端形桥墩 概化水槽试验 |
| DOI： |
| 分类号:U611 |
| 基金项目:交通部行业联合科技攻关项目，湖南省重点学科建设资助项目 |
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| Experimental study of lateral turbulent flow width at round-ended pier |
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HU Xu-yue,ZU Xiao-yong,CHENG Yong-zhou,LI Ying-fa,WANG Qiao-yang
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HU Xu-yue,ZU Xiao-yong,CHENG Yong-zhou,LI Ying-fa,WANG Qiao-yang(School of Hydraulic Engineering,Changsha University of Science and Technology,Changsha 410076,China
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| Abstract: |
| The conceptual experiment has been done in a flume,and the three-dimensional ultrasonic Doppler speedometer ADV is used to measure the 3-D flow field and the turbulence intensity field around a round-ended pier.The vertical distribution of the turbulence intensity with the pier and the traverse distribution of the turbulence intensity ratio in the flume with or without the pier have been analyzed.The results show that the location of the maximum of the turbulence intensity on the perpendicular line is to pr... |
| Key words: turbulence intensity width of turbulent flow round-ended pier conceptual flume experiment |
