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。
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.
出处
《机械科学与技术》
CSCD
北大核心
2014年第4期559-563,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50975083)
湖南大学"青年教师成长计划"项目资助
关键词
SAE汽车模型
非光滑表面
流场控制
气动减阻
aerodynamics drag reduction
automobiles
boundary conditions
calculations
computational fluid dy- namics
computer simulation
drag coefficient
drag reduction
flow control
flow field control
flow fields
mesh generation
non-smooth surface
pressure
SAE car model
turbulence models
vectors
velocity
