| 摘要: |
| 通过概化水槽试验,采用M icroADV流速仪测量瞬时流速,得到桥墩周围纵向、横向和垂向时均流速和紊流强度的横向分布.比较了有、无桥墩的时均流速和紊流强度横向分布变化,得出桥墩对时均流速和紊流强度的影响幅度和范围,据此确定桥墩侧边缘的紊流宽度,并给出了桥墩最大紊流宽度随断面平均流速变化的关系. |
| 关键词: 断面平均流速,时均流速,紊流强度,紊流宽度,桥墩,概化水槽试验 |
| DOI： |
| 分类号:U442.54 |
| 基金项目:973资助项目(2003CB415205)，国家自然科学基金资助项目(50479036) |
|
| Experimental study of turbulent width at piers |
|
HE Xiao-hua,CHEN Li,WANG Xin,ZHANG Jiong
|
|
State Key Laboratory of Water Resources and Hydropower Engineering Sciences, Wuhan University, Wuhan 430072, China
|
| Abstract: |
| By conceptual flume experiments,the longitudinal,lateral and vertical time-average velocity and lateral distribution of turbulent intensity around a!pier are presented by using a Micro Acoustic-Doppler Velocimeter(MicroADV) to measure the instantaneous velocity.Comparison of time-average velocity and lateral distribution of turbulent intensity with and without piers is carried out,influences of the pier on time-average velocity and turbulent intensity are presented,turbulent width at the edge of a pier and the relationship between the maximum width of turbulent and mean velocity in section are also presented. |
| Key words: mean velocity in section,time-average velocity,turbulent intensity,turbulent width,pier,conceptual flume experiment |
