1.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.Wind Engineering Research Center, Shijiazhuang Tiedao University,Shijiazhuang 050043,China;
3.China Three Gorges Corporation Fujian Energy Investment Co., Ltd.,Fuzhou 350003, China
Abstract:Circular cylinder members are widely used in civil engineering.Wind induced large-amplitude vibration often occurs in slender structures with circular cross-sections.The mostly used testing models are usually sectional models because of the limitation of wind tunnels.Therefore, the aspect ratio is a significant parameter in aerodynamic force test in wind tunnels.The local aerodynamic forces at the middle of the cylinders at the subcritical, critical and supercritical Reynolds number were measured for several models with various aspect ratios through the pressure measurement on rigid section models in the wind tunnel.The results show that the variation of aerodynamic forces is discontinuous along with the change of the aspect ratio, and the variation is different in subcritical, critical and super critical regions, when the end plate with 4 times diameter of the cylinder is mounted.In the subcritical region, when the aspect ratios is less than 9, the aerodynamic results at the span middle are greatly influenced by the aspect ratio, and the results are quite different from the results of the two-dimensional cylinder tests.In the critical Reynolds number range, the results of the aerodynamic test at the span middle are less influenced by the aspect ratio, and exhibit stronger three-dimensional characteristics.The stable single separating bubble could be observed only when the aspect ratio is not less than 11, in supercritical regions, when the aspect ratios is less than 9, the flow state of the cylinder enters into a single separating bubble basin.
黄伯城1,马文勇1,2,柴晓兵1,曾建平3,杨家溢3. 长细比对光滑圆柱气动力特性影响的试验研究[J]. 振动与冲击, 2019, 38(14): 195-201.
HUANG Bocheng1,MA Wenyong1,2,CHAI Xiaobing1,ZENG Jianping3,YANG Jiayi3. Experimental study on the effects of aspect ratios on the aerodynamic characteristics of a smooth cylinder. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(14): 195-201.
[1] 何敏娟,李旭.高耸结构基于性能的抗风设计[J].振动与冲击,2013,32(3):87-105.
He Minjuan,Li Xu. Performance-based anti-wind design of high-rise buildings [J].Journal of vibration and shock,2013,32 (3): 87-105.
[2] 汤卓,王雪,束磊,吕令毅. 210m高异形烟囱横风向动力响应研究[J], 建筑结构,2010,40(2):100-102.
Tang zhuo,Wang xue,Shu lei,Lv Lingyi. Research on across-wind dynamic response of a 210m-high special-shaped chimney[J].building structure, 2010,40(2):100-102.
[3] Zdravkovich, M.M. Flow around circular cylinders[M].Oxford University Press 1997.
[4] K. Matsuda, H. Uejima,T. Sugimoto. Wind tunnel tests on in-line oscillation of a two-dimensional circular cylinder[J]. Journal of Wind Engineering and Industrial Aerodynamics 91 (2003) 83–90.
[5] H. Nishimuraa, Y. Taniike.Aerodynamic characteristics of fluctuating forces on a circular cylinder[J].Journal of Wind Engineeringand Industrial Aerodynamics 89 (2001):713–723.
[6] Yoshinobu, KUBO, Kusuo, KATO.The role of the end plates in two dimensional wind tunnel tests[J]. Proceedings of the Japan Society of Civil Engineers,1986,368: 179-186.
[7] NORBERG,C.An experimental investigation of the flow around a circular cylinder:Influence of aspect ratio[J]. Journal of Fluid Mechanics, 1994, 258(1):287-316.
[8] 赵萌, 毛军, 郗艳红. 高雷诺数下有限长圆柱绕流阻力特性研究[J].机械工程学报,2015,51(22):176-182.
ZHAO Meng,MAO Jun,XI Yanhong. Research on Drag Characteristic of Flow around Finite Circular Cylinder at High Reynolds Numbers[J].JOURNAL OF MECHANICAL ENGINEERING, 2015,51(22):176-182.
[9] Ali Vakil, Sheldon I. Green. Drag and lift coefficients of I nclined finite circular cylinders at moderate Reynoldsnumbers[J]. Computers & Fluids 38 (2009) 1771–1781.
[10] R.T. Gonçalves , G.R.Franzini,G.F.Rosetti,J.R.Meneghin, A.L.C.Fujarra. Flow around circular cylinders with very low aspect ratio[J]. Journal of Fluids and Structures,54(2015):122–141.
[11] 端木玉,万德成.不同长细比圆柱绕流的大涡模拟[J].水动力学研究与进展,2016,36(3):295-302.
Duang Muyu,Wan Decheng.Large eddy simulation of flow around the cylinders with differents aspects[J].Chinese Journal of Hydrodynamics, 2016,36(3):295-302.
[12] WISSINK J, RODI W. Numerical study of the near wake of a circular cylinder[J].International Journal of Heat and Fluid Flow, 2008, 29(4): 1060-1070
[13] 郑云飞,刘庆宽,刘小兵,马文勇.端部状态对斜拉索节段模型气动特性的影响[J].工程力学,2017,34(增刊),192-196.
Zheng Yunfei, Liu Qingkuan, Liu Xiaobing, Ma Wenyong. Influence of end conditions on aerodynamic force of section models for stay-cables[J].engineering mechanics,2017,34(supplement),192-196.
[14] 陆志良等.空气动力学[M].北京:北京航空航天大学出版社,2009.
Lu Zhiliang et al. Aerodynamics[M].Beijing: BeiHang University Press,2009.
[15] 孙 瑛,邱 冶,武 岳. 基于气动参数识别技术的钝体雷诺数效应研究[J].建筑结构学报,2016,37(1):56-64.
SUN Ying, QIU Ye, WU Yue.Research on Reynolds number effect of bluff bodies based on aerodynamic parameter identification techniques[J]. Journal of Building Structures, 2016,37(1):56-64
[16] Glauert H. Wind tunnel interference on wings bodies and airscrews[R]. London ,UK Aeronautical Research Council1933.
[17] Rodríguez, O. Lehmkuhl, J. Chiva, R. Borrell, A. Oliva. On the flow past a circular cylinder from critical to super-critical Reynolds numbers: Wake topology and vortex shedding[J]. International Journal of Heat and Fluid Flow 55 (2015) 91–103
[18] 刘庆宽,邵奇,郑云飞等.雷诺数对圆柱气动力和流场影响的试验研究[J].实验流体力学,2016,30(4):7-13.
Liu Qingkuan,Shao Qi,Zheng Yunfei et al. Experimental study on Reynolds number effect on aerodynamic pressure and forces of cylinder[J]. Journal of Experiments in Fluid Mechanics, 2016,30(4):7-13.
[19] 马文勇,袁欣欣等. 圆形断面在35k~330k雷诺数范围的气动力特性研究[J]. 工程力学,2015,36(增刊).
Ma Wenyong,Yuan Xinxin et al. characteristics of aerodynamic forces on a circular Cylinder at reynolds numbers from 35k to 330k[J]. engineering mechanics, 2015,36(supplement).