前置隔板对圆柱绕流影响的实验分析

周潇; 胡烨; 王晋军

doi:10.13700/j.bh.1001-5965.2015.0053

前置隔板对圆柱绕流影响的实验分析

doi: 10.13700/j.bh.1001-5965.2015.0053

北京航空航天大学航空科学与工程学院, 北京 100083

基金项目: 国家自然科学基金(11302018);中国博士后科学基金(2014M560036)

详细信息

作者简介:
周潇男,硕士研究生。主要研究方向:流动控制。Tel.:010-82338413E-mail:zx910819zx@163.com;胡烨女,博士。主要研究方向:实验流体力学。Tel.:18810609581E-mail:doubleover@sohu.com;王晋军男,博士,教授,博士生导师。主要研究方向:实验流体力学。E-mail:jjwang@buaa.edu.cn

通讯作者:
胡烨,Tel.:18810609581E-mail:doubleover@sohu.com

中图分类号: O357.1
计量
- 文章访问数: 898
- HTML全文浏览量: 116
- PDF下载量: 607
- 被引次数: 0
出版历程
- 收稿日期: 2015-01-26
- 网络出版日期: 2016-01-20

Experimental analysis on flow past circular cylinder attached to frontal splitter plate

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Funds: National Natural Science Foundation of China (11302018); China Postdoctoral Science Foundation(2014M560036)

摘要

摘要: 对经典的圆柱绕流模型,运用前置隔板对流场进行控制。利用粒子图像测速(PIV)方法在自循环水槽中研究了雷诺数为1 800时,柔性和刚性2种不同刚度的前置隔板对圆柱绕流的影响。研究发现:柔性隔板自由端的弯曲增加了对流场的额外扰动,并且柔性隔板弯曲变形会诱导产生脱落涡,导致尾迹流场的主频发生变化。在圆柱下游流场,无隔板工况与柔性隔板工况的回流区长度相当,刚性隔板工况的回流区相较之下则更长。结果显示:前置隔板还能在一定程度上减小圆柱绕流的阻力。
- 圆柱 /
- 涡结构演化 /
- 前置隔板 /
- 柔性材料 /
- 粒子图像测速(PIV)
Abstract: Considering the classic circular cylinder flow model, a frontal splitter plate was introduced to explore the influence on the flow past a circular cylinder in a water channel. Particle imaging velocimetry (PIV) was utilized to investigate the flow characteristics of the circular cylinder attached to a splitter plate with two different stiffness (flexible and rigid) respectively at the Reynolds number of Re=1 800. Owing to the bending deformation of the flexible plate's leading point, an additional perturbation results in the generation of vortex on the tip of the plate and even varies the dominant frequency in the wake region.In the downstream of the cylinder, the sizes of reverse flow region in the flexible plate condition and the no-plate condition are similar, while the size of reverse flow region in the rigid plate condition is larger. The experiment results show that the drag force of the circular cylinder could be reduced in a degree by the frontal splitter plate.
- circular cylinder /
- vortex structure evolution /
- frontal splitter plate /
- flexible material /
- particle image velocimetry (PIV)

HTML全文

参考文献(18)

[1]	CHOI H,JEON W P,KIM J.Control of flow over a bluff body[J].Annual Review of Fluid Mechanics,2008,40:113-139.
[2]	LEE S J,LEE S I,PARK C W.Reducing the drag on a circular cylinder by upstream installation of a small control rod[J].Fluid Dynamics Research,2004,34(4):233-250.
[3]	SHIH W C L,WANG C,COLES D,et al.Experiments on flow past rough circular cylinders at large Reynolds numbers[J].Journal of Wind Engineering and Industrial Aerodynamics,1993,49(1):351-368.
[4]	BEARMAN P W,HARVEY J K.Control of circular cylinder flow by the use of dimples[J].AIAA Journal,1993,31(10):1753-1756.
[5]	CHOI J,JEON W P,CHOI H.Mechanism of drag reduction by dimples on a sphere[J].Physics of Fluids,2006,18(4):041702.
[6]	LEE S J,KIM H B.The effect of surface protrusions on the near wake of a circular cylinder[J].Journal of Wind Engineering and Industrial Aerodynamics,1997,69-71:351-361.
[7]	LIM H C,LEE S J.Flow control of circular cylinders with longitudinal grooved surfaces[J].AIAA Journal,2002,40(10):2027-2036.
[8]	ANDERSON E,SZEWCZYK A.Effects of a splitter plate on the near wake of a circular cylinder in 2 and 3-dimensional flow configurations[J].Experiments in Fluids,1997,23(2):161-174.
[9]	HWANG J Y,YANG K S,SUN S H.Reduction of flow-induced forces on a circular cylinder using a detached splitter plate[J].Physics of Fluids,2003,15(8):2433-2436.
[10]	KWON K,CHOI H.Control of laminar vortex shedding behind a circular cylinder using splitter plates[J].Physics of Fluids,1996,8(2):479-486.
[11]	OZONO S.Flow control of vortex shedding by a short splitter plate asymmetrically arranged downstream of a cylinder[J].Physics of Fluids,1999,11(10):2928-2934.
[12]	ROSHKO A.On the wake and drag of bluff bodies[J].Journal of the Aeronautical Sciences,1955,22(2):124-132.
[13]	HWANG J Y,YANG K S.Drag reduction on a circular cylinder using dual detached splitter plates[J].Journal of Wind Engineering and Industrial Aerodynamics,2007,95(7):551-564.
[14]	QIU Y,SUN Y,WU Y,et al.Effects of splitter plates and Reynolds number on the aerodynamic loads acting on a circular cylinder[J].Journal of Wind Engineering and Industrial Aerodynamics,2014,127:40-50.
[15]	HEATHCOTE S,GURSUL I.Flexible flapping airfoil propulsion at low Reynolds numbers[J].AIAA Journal,2007,45(5):1066-1079.
[16]	KANG C K,AONO H,CESNIK C E,et al.Effects of flexibility on the aerodynamic performance of flapping wings[J].Journal of Fluid Mechanics,2011,689:32-74.
[17]	ANTONIA R,RAJAGOPALAN S.Determination of drag of a circular cylinder[J].AIAA Journal,1990,28(10):1833-1834.
[18]	ZHOU J,ADRIAN R J,BALACHANDAR S,et al.Mechanisms for generating coherent packets of hairpin vortices in channel flow[J].Journal of Fluid Mechanics,1999,387:353-396.