基于仿生学的汽车后缘尾翼噪声机理及其控制研究

项目名称： 基于仿生学的汽车后缘尾翼噪声机理及其控制研究

项目编号： No.51505182

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 葛长江

作者单位： 吉林大学

项目金额： 20万元

中文摘要： 汽车的气动噪声问题是当前汽车研究领域的热点和前沿。但现有的研究大多基于传统的车身部件，很少考虑汽车尾翼的噪声影响。事实上，汽车尾翼可以散射汽车后缘湍流边界层中的脉动，产生强烈的声源。本项目拟通过仿生工程与车身工程的学科交叉，以汽车后缘尾翼为研究对象，研究掌握基于仿生学的汽车后缘尾翼噪声机理及相关的降噪技术。根据鸮翼噪声理论，对汽车后缘尾翼噪声进行定性分析和仿生识别，确定发声机制。以此为基础，利用仿鸮翼降噪技术对汽车后缘尾翼进行仿生降噪设计。本项目的开展，将探索出一套全新的设计方法，使汽车气动噪声研究从传统的车身部件拓展到后缘尾翼，以便汽车运行的更加安静和舒适。

中文关键词： 汽车尾翼；气动噪声机理；后缘散射；仿生设计；降噪

英文摘要： Car aeroacoustic problem is the current hot and advanced research. However, the existing studies are mostly based on the traditional car body parts, with little regard for the effects of car tail wing noise. In fact, the turbulent boundary layer can be scattered by car trailing-edge tail wing, resulting in a strong sound source. The project intends to work on car trailing-edge tail wing through interdisciplinary study of bionic engineering and car body engineering, and researches and masters the car trailing-edge tail wing noise mechanism and associated noise reduction technology. According to owl wing noise theory, car tail wing noise is qualitatively analyzed and identified, thus the sound generation mechanism is determined. On this basis, the bionic owl wing noise reduction technology is use for the car trailing-edge tail wing noise reduction design. The project will explore a new design method, making the car aeroacoustic study to expand from the traditional car body parts to the trailing-edge tail wing, so that cars runs more quietly and comfortably.

英文关键词： car tail wing;aeroacoustic mechanism;trailing-edge scattering;bionic design;noise reduction