| 汽车尾迹区涡流频率特性实验分析 |
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| 引用本文： | 朱晖,杨志刚.汽车尾迹区涡流频率特性实验分析[J].气动实验与测量控制,2013(3):65-69. |
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| 作者姓名： | 朱晖 杨志刚 |
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| 作者单位： | [1]同济大学上海地面交通工具风洞中心,上海201804 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）资助项目（2011CB711203）; 湖南大学汽车车身先进设计制造国家重点实验室开放基金31115024资助 |
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| 摘 要： | 基于模型风洞实验台架,对汽车模型外流场尾迹区流动结构进行实验研究。采用热线风速仪,对外流场尾迹区中选定测点处的三维速度场进行采样。针对速度场的采样数据,进行功率谱密度分析,探讨了汽车尾迹区破裂涡流的频率特性及其变化规律。分析结果得出：流体微团随着流场整体运动的同时,在其运动轨迹附近进行三维脉动。
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| 关 键 词： | 汽车空气动力学 涡流 频谱分析 汽车模型 速度测量 |
Experimental analysis on frequency characteristics of vortex flow in the wake of vehicles |
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| Authors: | ZHU Hui YANG Zhi-gang |
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| Institution: | 1. Shanghai Automobile Wind Tunnel Center, Tongji University, Shanghai 201804, China; 2. State Key Laboratory of Advanced Design and Manu{aeturing for Vehicle Body, Hunan University, Changsha 410082, China) |
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| Abstract: | The model wind tunnel is adopted to research the structure of flow field in the wake of vehicle models. The components of velocity have been captured by using 3D CTA at chosen sampling points. According to the sampling data, the frequency characteristics and variation regularity of breakdown vortex flow have been revealed by spectrum analysis. It is indicated that fluid element fluctuates surrounding stream line when moving with the whole vortex flow fluid. |
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| Keywords: | automotive aerodynamics vortex flow spectrum analysis vehicle model velocity measurement |
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