全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

错列双钝体断面气动绕流干扰效应的数值模拟

, PP. 97-102

Keywords: 桥梁工程,气动干扰效应,增强壁面处理,双钝体,气动力系数,风攻角,风向

Full-Text   Cite this paper   Add to My Lib

Abstract:

为研究既有桥梁对近桥位复线桥的气动干扰,选取不同梁高典型断面,采用增强壁面处理(EWT)的数值模拟方法,对比研究了主梁断面高度、来流风攻角及风向等因素对错列双钝体断面间的气动特性影响,并对其流场结构进行了分析。研究结果表明受既有桥梁影响,复线桥主梁断面在位于迎风向和背风向时,三分力系数与单幅断面差异显著。对于不同梁高情况,复线桥监测断面位于背风向时,迎风侧腹板负压区随遮挡面积的增大而增大,扭转效应更为明显,升力方向随梁高变化发生改变;对于不同来流攻角情况,背风向监测断面在负攻角下所受阻力较对应正攻角略大,攻角增大引起了断面间大涡的破裂。断面形状、高度、遮挡面积及来流攻角均在不同程度上引起绕流特性的改变。

References

[1]  朱乐东,周奇,郭震山,等. 箱形双幅桥气动干扰效应对颤振和涡振的影响[J]. 同济大学学报: 自然科学版,2010,38 (5): 632-638.ZHU Le-dong, ZHOU Qi, GUO Zhen-shan, et al.Aerodynamic Interference Effects on Flutter and Vortexexcited Resonance of Bridges with Twin-separate Parallel Box Deck [J]. Journal of Tongji University: Natural Science Edition,2010,38 (5): 632-638.
[2]  KIM M K,KIM D K,YOON S H,et al. Measurements of the Flow Fields around Two Square Cylinders in a Tandem Arrangement [J]. Journal of Mechanical Science and Technology,2008,22 (2): 397-407.
[3]  MITTAL S,KUMAR V,RAGHUVANSHI A. Unsteady Incompressible Flows Past Two Cylinders in Tandem and Staggered Arrangements [J]. International Journal for Numerical Methods in Fluids,1997,25 (11): 1315-1344.
[4]  刘志文,陈政清,栗小祜,等. 串列双流线型断面涡激振动气动干扰试验[J]. 中国公路学报,2011(3): 51-57.LIU Zhi-wen,CHEN Zheng-qing,LI Xiao-hu, et al.Aerodynamic Interference Test on Vortex-induced Vibration of Two Streamline Cylinders in Tandem [J]. China Journal of Highway and Transport,2011 (3): 51-57.
[5]  陈素琴,黄自萍,沈剑华,等. 两串列方柱绕流的干扰数值研究[J]. 同济大学学报: 自然科学版,2001,29 (3): 320-324.CHEN Su-qin,HUANG Zi-ping,SHEN Jian-hua,et al.Numerical Computation of the Flow around Two Square Cylinders in Tandem Arrangement [J]. Journal of Tongji University: Natural Science Edition,2001,29 (3):320-324.
[6]  楼小峰,曹丰产,林志兴. 串列钝体绕流的数值计算[J]. 同济大学学报: 自然科学版,2002,30 (5):604-608.LOU Xiao-feng, CAO Feng-chan, LIN Zhi-xing.Numerical Simulation of Flows around Two Bluff Bodies in Tandem Arrangements [J]. Journal of Tongji University:Natural Science Edition,2002,30 (5): 604-608.
[7]  陈懋章. 粘性流体动力学基础[M]. 北京,高等教育出版社,2006.CHEN Mao-zhang. Fundamentals of Viscous Fluid Dynamics [M]. Beijing: Higher Education Press,2006.
[8]  SIMIU E,SCANLAN R H. Wind Effects on Structures:An Introduction to Wind Engineering [M]. New York:Wiley Press,1996.
[9]  王福军. 计算流体动力学分析: CFD 软件原理与应用[M]. 北京,清华大学出版社,2006.WANG Fu-jun. Computational Fluid Dynamics: Principles and Applications of CFD Software [M]. Beijing: Tsinghua University Press,2006.
[10]  LOUREIRO J B R,ALHO A T P,FREIRE A P S. The Numerical Computation of Near-Wall Turbulent Flow over a Steep Hill [J]. Journal of Wind Engineering and Industrial Aerodynamics,2008,96 (5): 540-561.
[11]  WILCOX D C. Formulation of the k-ω Turbulence Model Revisited [J]. AIAA Journal,2008,46 (11): 2823-2838.
[12]  于冲,王旭,董福安,等. y + 值对翼型气动参数计算精度的影响研究[J]. 空军工程大学学报: 自然科学版,2012,13 (3): 25-29.YU Chong,WANG Xu,DONG Fu-an,et al. The Study of Effect of y + on Precision of Pneumatic Parameters of Foil[J]. Journal of Air Force Engineering University: Natural Science Edition,2012,13 (3): 25-29.
[13]  VERSTEEG H K,MALALASEKERA W. An Introduction to Computational Fluid Dynamics: the Finite Volume Method [M]. New York: Wiley Press,1995.
[14]  OHYA Y,OKAJIMA A,HAYASHI M. Wake Interference and Vortex Shedding [M] ∥CHEREMISINOFF N P.Encyclopedia of Fluid Mechanics. Houston, TX: Gulf Publishing,1989: 322-389.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133