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圆柱绕流局部冲刷机制的实验研究
Alternative TitleEXPERIMENTAL INVESTIGATION ON THE LOCAL SCOURING MECHANISM AROUND A CIRCULAR PIER
赵威; 呼和敖德
Source Publication力学学报
2006
Volume38Issue:5Pages:577-585
ISSN0459-1879
Abstract采用粒子图像测速技术和粒子图像识别技术研究了冲刷坑的演化过程及局部冲刷的流体动力机制.首先研究了动床条件下圆柱周围的床面演化过程,给出垂直对称面输沙率随时间变化以及圆柱下游垂直对称面的沙颗粒浓度和泥沙分布规律;其次针对典型冲刷坑形状固定底床,测量了圆柱下游的瞬时流场,并给出平均流场.结果表明尾流区平均剪应力较低,但垂向涡量和湍流强度较高.分析指出平均剪应力较低的尾流区域,局部冲刷的主要动力机制是尾涡和湍流的综合作用.
Keyword局部冲刷机制 沙颗粒运动 粒子图像测速技术 粒子图像识别技术
Subject Area力学
Indexed ByEI ; CSCD
Language中文
CSCD IDCSCD:2425854
Citation statistics
Cited Times:7[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/16757
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714		 赵威,呼和敖德. 圆柱绕流局部冲刷机制的实验研究[J]. 力学学报,2006,38,5,:577-585.
APA 赵威,&呼和敖德.(2006).圆柱绕流局部冲刷机制的实验研究.力学学报,38(5),577-585.
MLA 赵威,et al."圆柱绕流局部冲刷机制的实验研究".力学学报 38.5(2006):577-585.
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