摘要
将凹坑型非光滑表面布置在不同车型的尾部,研究其对气动阻力的影响。通过数值计算方法,得出不同车型的气动阻力值,并对比试验结果验证其可靠性。同时模拟出3种不同车型的尾部流场、压力等参数,并对比分析光滑模型与非光滑模型之间的参数差异,分析尾部非光滑车表减阻的机理。研究表明:尾部非光滑表面对于不同车型均有一定程度的减阻效果。
Pit-type non-smooth surface is arranged in vehicle rear end of different models,and its impact on aerodynamic drag is studied. The aerodynamic resistance of different models is obtained through numerical calculation method,and the experiment results verify the reliability. The parameters of three different models such as the tail flow and pressure are simulated,and the parameter differences between smooth model and non-smooth model are compared,and the mechanism of drag reduction for the tail non-smooth surface is analyzed. The results show that the tail non-smooth surface has a certain degree of drag reduction for different models.
出处
《机械科学与技术》
CSCD
北大核心
2015年第2期287-290,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51375155)
湖南省自然科学基金项目(12JJ3041)资助
关键词
尾部非光滑表面
不同车型
气动阻力
尾部流场
减阻效果
aerodynamic drag
calculations
computational fluid dynamics
different models
drag reduction
experiments
flow fields
mathematical models
mesh generation
pressure
reliability
tail flow
tail non-smooth surface
turbulence models
wind tunnels
