迎风面肋板对方柱流场和气动力的影响研究

Abstract
Figure/Table
References (30)
Related Citation (15)

Download: PDF (2214 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Previous studies have demonstrated that the facade ribs could significantly reduce the wind load of high-rise building. However, the flow filed modification mechanism of these facade appurtenances has not been clarified. Therefore, in this study, large eddy simulations (LES) are carried out to investigate the impact of windward-face-mounted vertical ribs on flow filed and aerodynamic forces of square cylinder under smooth inflow. The flow structure, wind pressure distributions and aerodynamic forces of different models are analyzed to elaborate the flow filed mechanism of the vertical ribs. It is found that local recirculation are introduced in the front corner region owing to the presence of ribs, which obviously influences the flow separation and the behavior of shear layer. Rib depth d significantly affect the flow structure, vortex-shedding frequency and wind pressure distribution. The changes in the flow field result in remarkable mitigation of mean drag C ̅_d and fluctuating lift C’l. There are optimal combination value of rib position parameters b and extension depth d, the aerodynamic forces is smallest in these cases. The maximum reduction ratios of C ̅_d and C’l reach 50% and 86%, respectively, when d/D=0.12 and b/D=0.10.

Key words： Aerodynamic modification Square cylinder Vertical ribs LES Flow Field Aerodynamic forces;

Received: 02 August 2022 Published: 28 September 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	JIANG Yuan1
	2
	LIU Jinyang2
	LIU Rui1
	HUI Yi2

Cite this article:

JIANG Yuan1,2,LIU Jinyang2, et al. LES study of windward-face-mounted ribs’ effects on flow fields and aerodynamic forces on a square cylinder[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(18): 225-232.

URL:

http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I18/225

[1] 卢姗姗, 张志富, 刘金博, 等. 高层建筑结构风致振动的被动吸吹气流动控制研究[J]. 振动与冲击, 2021, 40 (11) : 7-16.
LU Shanshan, ZHANG Zhifu, LIU Jinbo, et al. Passive suction and blowing flow control of wind- induced vibration of tall buildings [J]. Journal of Vibration and Shock, 2021, 40 (11) : 7-16.
[2] 毛璐璐, 韩兆龙, 周岱, 等. 典型形体超高层建筑的风压风场与抗风优化研究[J]. 振动与冲击, 2019, 38 (18) : 215-222.
MAO Lulu, HAN Zhaolong, ZHOU Dai, at el. Wind pressure and wind-resistant shape optimization of typical super high-rise buildings[J]. Journal of Vibration and Shock, 2019, 38 (18) : 215-222.
[3] Tanaka. H, Tamura. Y, Ohtake. K, et al. Experimental investigation of aerodynamic forces and wind pressures acting on tall buildings with various unconventional configurations, Journal of Wind Engineering and Industrial Aerodynamics. 2012, 107, 179-191.
[4] Sharma, A., Mittal, H., Gairola, A. Mitigation of wind load on tall buildings through aerodynamic modifications. Journal of Building Engineering. 2018, 18, 180-194.
[5] 陈伏彬, 李秋胜. 大开洞对高层建筑风效应的影响研究[J]. 湖南大学学报 (自然科学版), 2015, 42(03): 84-88.
CHEN Fubin， LI Qiusheng． Investigation of the influence of openings on the wind effect of tall buildings [J]. Journal of Hunan University (Natural Sciences), 2015, 42(3) : 84.
[6] 郑德乾, 刘帅永, 马文勇, 等. 倒角切角对方柱气动性能影响的大涡模拟研究[J]. 振动与冲击, 2021, 40 (01): 8-14.
ZHENG Deqian, LIU Shuaiyong, MA Wenyong, et al. Large eddy simulation for effects of chamfering and corner cut on aerodynamic performance of square cylinder [J]. Journal of Vibration and Shock, 2021, 40 (01): 8-14.
[7] 庄翔, 郑毅敏, 郑晓芬, 等. 不同圆角率下矩形高层建筑风荷载特性 [J]. 建筑结构学报, 2018, 39 (S1): 1-8.
ZHUANG Xiang, ZHENG Yimin, ZHENG Xiaofen, et al. Wind load characteristics of rectangular high-rise buildings with various rounded corner ratios [J]. Journal of Building Structures. 2018, 39 (S1): 1-8. (in Chinese)
[8] Tamura. T, Miyagi. T, Kitagishi. T, Numerical prediction of unsteady pressures on a square cylinder with various corner shapes, Journal of Wind Engineering and Industrial Aerodynamics. 1998, 74, 531-542.
[9] Zhang. W, Samtaney. R, Low-Re flow past an isolated cylinder with rounded corners, Computers & Fluids. 2016, 136, 384-401.
[10] Zafar. F, Alam. M. M. Flow structure around and heat transfer from cylinders modified from square to circular, Physics of Fluids. 2019, 31 (8) : 083604.
[11] Ueda. Y, Kurata. M, Kida. T, et al. Visualization of flow past a square prism with cut-corners at the front-edge, Journal of visualization. 2009, 12 (4): 383-391.
[12] He. G.S, Li. N, Wang. J.J, Drag reduction of square cylinders with cut-corners at the front edges, Experiments in fluids. 2014, 55 (6): 1745.
[13] 袁珂, 张小平, 回忆, 等. 附属物对高层建筑局部风压的影响规律研究 [J]. 振动与冲击, 2020, 39(07): 202-208.
YUAN Ke, ZHANG Xiaoping, HUI Yi, et al. Study on the influence of appendages on local wind pressure of high-rise buildings [J]. Journal of vibration and shock, 2020, 39(07): 202-208.
[14] Stathopoulos. T, Zhu. X, Wind pressures on building with appurtenances, Journal of Wind Engineering and Industrial Aerodynamics. 1988, 31 (2-3): 265-281.
[15] Hui. Y, Yuan. K, Chen. Z, et al. Characteristics of aerodynamic forces on high-rise buildings with various façade appurtenances, Journal of Wind Engineering and Industrial Aerodynamics. 2019, 191: 6-90.
[16] Yang. Q, Liu. Z, Hui. Y et al. Modification of aerodynamic force characteristics on high-rise buildings with arrangement of vertical plates, Journal of Wind Engineering and Industrial Aerodynamics. 2020, 200: 104155.
[17] Liu. J, Hui. Y, Yang. Q, et al. Flow field investigation for aerodynamic effects of surface mounted ribs on square-sectioned high-rise buildings, Journal of Wind Engineering and Industrial Aerodynamics. 2021, 211: 104551.
[18] 艾辉林, 周志勇. 超高层建筑外表面复杂装饰条的风荷载特性研究[J].工程力学, 2016, 33(08): 141-149.
AI Huilin, ZHOU Zhiyong. Research on wind load characteristics of complex decorative strips on the outer surface of high-rise building [J]. Engineering Mechanics, 2016, 33(08): 141-149.
[19] 程旭. 粗糙条围护结构对高层建筑风荷载影响的研究[D]. 西南交通大学, 2020.
CHEN Xu. Influence of architectural facades on wind loads of tall buildings. [D]. Southwest Jiaotong University, 2020.
[20] Trias. F. X, Gorobets. A, Oliva. A, Turbulent flow around a square cylinder at Reynolds number 22,000: A DNS study. Computers & Fluids. 2015, 123: 87-98.
[21] Cao. Y, Tamura. T, Large-eddy simulations of flow past a square cylinder using structured and unstructured grids, Computers & Fluids. 2016, 137: 36-54.
[22] Hu. J. C, Zhou. Y, Dalton. C. Effects of the corner radius on the near wake of a square prism, Experiments in Fluids. 2006, 40 (1): 106-118.
[23] 杜晓庆, 刘延泰, 董浩天, 等. 类方柱的气动性能和流场特性[J].湖南大学学报 (自然科学版), 2020, 47 (05): 88-98.
DU Xiaoqing, LIU Yantai, DONG Haotian, et al. Aerodynamic performance and flow feature of square cylinders with cross-section modification [J]. Journal of Hunan University (Natural Sciences), 2020, 47 (05): 88-98.
[24] Lee. B. E, The effect of turbulence on the surface pressure field of a square prism[J]. Journal of Fluid Mechanics,1975, 69 (2): 263-282.
[25] Bearman. P. W, Obasaju. E. D, An experimental study of pressure fluctuations on fixed and oscillating square-section cylinders, Journal of Fluid Mechanics. 1982, 119: 297-321.
[26] Nishimura. H, Fundamental study of bluff body aerodynamics, Ph.D. Thesis Kyoto University. (2001) (in Japanese).
[27] Lyn. D. A, Einav. S, Rodi. W, et al. A laser-Doppler velocimetry study of ensemble-averaged characteristics of the turbulent near wake of a square cylinder, Journal of Fluid Mechanics. 1995, 304: 285-319.
[28] Rodi. W, Comparison of LES and RANS calculations of the flow around bluff bodies, Journal of wind engineering and industrial aerodynamics. 1997, 69: 55-75.
[29] Sohankar. A, Davidson. L, Norberg. C. Large eddy simulation of flow past a square cylinder: comparison of different subgrid scale models, Journal of Fluids Engineering,2000, 122 (1): 39-47.
[30] Yu. D, Butler. K, Kareem. A, et al. Simulation of the influence of aspect ratio on the aerodynamics of rectangular prisms, Journal of Engineering Mechanics. 2013, 139 (4): 429-438.

[1]	. [J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(2): 20-.