The Influence of Non-smooth Surface Effects on Aerodynamic Drag Reduction Based on SAE Model
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摘要: 以SAE汽车模型为研究对象,采用计算流体力学数值模拟方法研究非光滑表面布置位置对气动性能的影响。通过对SAE汽车模型的不同位置(侧部、底部、顶部、前部、尾部)布置凹坑型非光滑表面,计算SAE汽车模型的空气阻力系数,比较光滑表面与非光滑表面的流线、速度矢量以及压力,分析非光滑表面气动减阻机理和减阻效果差异的原因,根据分析结果得到了合理且能够减阻的汽车非光滑表面布置位置。Abstract: Based on SAE car model and using the computational fluid dynamics numerical simulation method,this paper mainly researched the influence that the different positions of non-smooth surfaces with decorating effect on the aerodynamic characteristics.By decorating pit type non-smooth surface on different positions of the SAE car model (sidepiece,bottom,top,front,rear),calculating air drag coefficient and comparing streamline,velocity vector,and pressure between non-smooth surface and the smooth surface,this paper analyzed the reducing drag mechanism of non-smooth surface and the reasons for the differences.According to the results of analysis,we could reasonably obtain the position of non-smooth decorating surface which can reduce the drag coefficient.
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Key words:
- aerodynamics drag reduction /
- automobiles /
- boundary conditions /
- calculations
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[1] 谷正气.汽车空气动力学[M]. 北京:人民交通出版社,2005 Gu Z Q. Automotive aerodynamics[M]. Beijing: China Communications Press,2005 (in Chinese) [2] Ren L Q,Han Z W,Tian L M,et al. Characteristics of the non-smooth surface morphology of living creatures and its application in agricultural engineering[J]. Design and Nature,2004,(6): 275-284 [3] 谌可,王耘,曹开元 等,仿生非光滑汽车表面的减阻分析[J]. 中国机械工程,2012,23(8): 1001-1006 Chen K,Wang Y,Cao K Y,et al. Analysis of aerody-namic drag reduction on automobile by using bionic non-smooth surface[J]. China Mechanical Engineering,2012,23(8): 1001-1006 (in Chinese) [4] 叶辉.汽车尾部上翘角与离地间隙的 CFD 研究[D]. 长春: 吉林大学,2006 Ye H. A parametric study on the diffuser and ground clearance of a simplified car model using CFD[D]. Changchun:Jilin University,2006 (in Chinese) [5] 容江磊,谷正气,杨易,等.基于 Kriging 模型的跑车尾翼断面形状的启动优化[J]. 中国机械工程,2010,22(2): 243-247 Rong J L,Gu Z Q,Yang Y,et al. Aerodynamic optimi-zation of cross sectional shape for a sports car's rear wing based on Kriging surrogate model[J]. China Mechanical Engineering,2010,22(2): 243-247 (in Chinese) [6] 谷正气,何忆斌,张洪涛,等.新概念车外流场数值仿真研究[J]. 中国机械工程,2007,18 (14): 1760-1763 Gu Z Q,He Y B,Zhang H T,et al. Numerical simula-tion study on external flow field of new concept car[J]. China Mechanical Engineering,2007,18(14): 1760-1763(in Chinese) [7] Ren L Q,Tian L M,Shi W P,et al. Drag reduction study of biomimetic non-smooth surface in low speed windtunnel[C]//Proceedings of the 7th Asia-Pacific Conference of the International Society for Terrain-Vehicle Syetems,2004: 444-451 [8] 王福军.计算流体动力学分析[M]. 北京: 清华大学出版社,2004 Wang F J. Computational fluid dynamics analysis[M]. Beijing:Tsinghua University Press,2004 (in Chinese) [9] 田丽梅,任露泉,刘庆平,等.仿生非光滑旋成体表面减阻特性数值模拟[J]. 吉林大学学报(工学版),2006,36(6): 909-913 Tian L M,Ren L Q,Liu Q P,et al. Numerical simula-tion on drag reduction characteristic around bodies of rev-olution with bionic non-smooth surface[J]. Journal of Jilin University(Engineering and Technology Edition),2006,36(6): 909-913 (in Chinese) [10] 张成春,任露泉,王晶,等.旋成体仿生凹坑表面流场控制减阻仿真分析[J]. 兵工学报,2009,30(9): 1068-1071 Zhang C C,Ren L Q,Wang J,et al. Simulation on flow control for drag reduction of revolution body using bionic dimpled surface[J]. Acta Armamentarii,2009,30(9): 1068-1071 (in Chinese) [11] Han M,Lim H,Jang C,et al. Fabrication of a micro-riblet film and drag reduction effects on curved objects. Transducers[J]. Solid-state Sensors,Actuators and Microsystems,2003 [12] 田丽梅.空气-旋成钝体界面非光滑减阻的仿生研究[D]. 长春: 吉林大学,2005 Tian L M. Bionic study of drag reduction between air and Non-smooth surface of blunt body of revolution model[D]. Changchun: Jilin University,2005 (in Chinese)
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