不同后倾角三维车辆的尾迹非定常流动分析

doi:10.13229/j.cnki.jdxbgxb201703004

吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (3): 717-724.doi: 10.13229/j.cnki.jdxbgxb201703004

不同后倾角三维车辆的尾迹非定常流动分析

崔文诗^{1, 2}, 杨志刚^{1, 2}, 王国俊^{1, 2}, 周华^{1, 2}

1.同济大学上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804;
2.同济大学上海地面交通工具风洞中心,上海 201804

出版日期:2017-05-20 发布日期:2017-05-20
通讯作者: 杨志刚(1961-),男,教授,博士生导师.研究方向:汽车空气动力学.E-mail:zhigang.yang@sawtc.com
作者简介:崔文诗(1986-),男,博士研究生.研究方向:汽车空气动力学.E-mail:1210765@tongji.edu.cn
基金资助:
“973”国家重大基础研究发展计划项目(2011CB711203)

Unsteady flow analysis for wakes of three-dimensional vehicles with different rear slant angles

CUI Wen-shi^{1, 2}, YANG Zhi-gang^{1, 2}, WANG Guo-jun^{1, 2}, ZHOU Hua^{1, 2}

1.Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thremal Management System, Shanghai 201804,China;
2.Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China

Online:2017-05-20 Published:2017-05-20

摘要/Abstract

摘要： 为了控制车辆气动力和噪声,基于热线风速仪将流动与频谱法、相关分析方法结合,对不同后倾角(0°,25°和35°)的三维车辆尾迹非定常流动进行试验研究。0°模型主频数为2个,对应流向和侧向涡脱落作用;25°模型主频数为4个,对应流向涡脱落及其共振作用、C柱涡和斜背动态分离作用;35°模型主频数为3个,对应C柱涡和上、下流向涡脱落作用。结果表明,模型间存在差异的原因是后倾角的不同使得流动分离位置、斜背流动、C柱涡产生差异,进而导致主频数及其表征的非定常流动结构、空间分布规律不同。

关键词: 车辆工程, 非定常流动, 尾迹, 涡脱落, 流动分离

Abstract: IN order to control the aerodynamic force and noise of ground vehciels, unsteady flows in the wake of three-dimensional (3D) vehicles with different rear slant angles (0°, 25° and 35°) were experimentally studied with fluid dynamics, spectrum and correlation analysis for data processing, using hot wire anemometry. Two frequencies measured in the wake of 0° model are resulted from the unsteady flow emanating from the recirculation bubbles in the flow direction and the side direction respectively. Four frequencies detected for the 25° model are ascribed to C-pillar vortex, dynamics attachment flow on the rear slant, the structures emanating from recirculation bubbles in flow direction and resonance effect. Three frequencies captured for 35° model are connected to the structures emanating from the recirculation bubbles in flow direction and C-pillar vortex. The differences are significant among different models. Flow separation position, flow on the rear slant, C-pillar vortex are all different for different slant angle, which explains the physical meaning for each unsteady flow, the quantity and spatial distribution of dominant frequency.

Key words: vehicle engineering, unsteady flow, wake, vortex shedding, flow separation

中图分类号:

U467.1

崔文诗, 杨志刚, 王国俊, 周华. 不同后倾角三维车辆的尾迹非定常流动分析[J]. 吉林大学学报(工学版), 2017, 47(3): 717-724.

CUI Wen-shi, YANG Zhi-gang, WANG Guo-jun, ZHOU Hua. Unsteady flow analysis for wakes of three-dimensional vehicles with different rear slant angles[J]. 吉林大学学报(工学版), 2017, 47(3): 717-724.

参考文献

[1] Choi H,Lee J,Park H. Aerodynamics of heavy vehicles[J]. Annual Review of Fluid Mechanics,2014,46(1):441-468.
[2] 朱晖,杨志刚. 类车体尾迹区流动的试验研究[J]. 试验流体力学,2010,24(2):24-27.
Zhu Hui, Yang Zhi-gang. Experimental study on the flow field in the wake of Ahmed model[J]. Journal of Experiments in Fluid Mechanics,2010,24(2):24-27.
[3] 王靖宇,胡兴军,李庆臣,等. 面包车尾部造型对其气动特性的影响[J]. 吉林大学学报:工学版,2011,41(3):618-622.
Wang Jing-yu,Hu Xing-jun, Li Qing-chen, et al. Influence of tail-end styling on aerodynamic characteristics of minibus[J]. Journal of Jilin University(Engineering and Technology Edition),2011,41(3):618-622.
[4] Aubrun S,Mcnally J,Alvi F,et al.Separation flow control on a generic ground vehicle using steady microjet arrays[J].Experiments in Fluids,2011,51(5):1177-1187.
[5] Wang X W,Zhou Y,Pin Y F, et al. Turbulent near wake of an Ahmed vehicle model[J]. Experiments in Fluids,2013,54(4):1-19.
[6] Thacker A,Aubrun S,Leroy A, et al. Experimental characterization of flow unsteadiness in the centerline plane of an Ahmed body rear slant[J]. Experiments in Fluids,2013,54(3):1-16.
[7] Tunay T,Sahin B,Ozbolat V.Effects of rear slant angles on the flow characteristics of Ahmed body[J].Experimental Thermal and Fluid Science,2014,57(3):165-176.
[8] Grandemange M,Gohlke M,Cadot O. Turbulent wake past a three-dimensional blunt body, Part 1:global modes and bi-stability[J]. Journal of Fluid Mechanics,2013,722:51-84.
[9] Zhang B F, Zhou Y,To S. Unsteady flow structures around a high-drag Ahmed body[J]. Journal of Fluid Mechanics,2015,777:291-326.
[10] Pastoor M, Henning L, Noack B R, et al. Feedback shear layer control for bluff body drag reduction[J]. Journal of Fluid Mechanics,2008,608:161-196.
[11] 李启良,杨志刚,陈枫. 汽车后视镜非定常流场的大涡模拟[J]. 空气动力学学报,2010,28(4):478-483.
Li Qi-liang, Yang Zhi-gang,Chen Feng. Large eddy simulation for unsteady flow field of automotive rear view mirror[J]. Acta Aerodynamica Sinica,2010,28(4):478-483.

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不同后倾角三维车辆的尾迹非定常流动分析

Unsteady flow analysis for wakes of three-dimensional vehicles with different rear slant angles

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