Three-Dimensional Global Stability Analysis and Bio-Mimetic Control of Buffet Phenomena via Wings with Wavy Leading and Trailing Edges

波状前缘和后缘机翼抖振现象的三维全局稳定性分析与仿生控制

• 批准号: 20K14953
• 负责人: Andrea Sansica
• 金额: $ 2.33万
• 依托单位: Japan Aerospace EXploration Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K14953/
• 关键词: bio-mimetic control; shock-oscillations; instability; transonic flows; Transonic buffet control; Global stability; Machine-learning; System identification; Bio-mimetic flow control; Transonic buffet; Buffet onset prediction; Buffet control; Tr; bio-mimetic control; shock-oscillations; instability; transonic flows; Transonic buffet control; Global stability; Machine-learning; System identification; Bio-mimetic flow control; Transonic buffet; Buffet onset prediction; Buffet control; Tr

Transonic buffet is an instability characterized by periodic self-sustained shock-oscillations that occur on aircraft wings at transonic conditions for increasing angles of attack. Controlling and suppressing buffet can have a significant impact in improving the aircraft overall performance and safety. To control buffet, we here proposed wings with wavy leading- and trailing edges, in the attempt to mimic the performance enhancement capabilities of the humpback whale pectoral fins. The effects of wavy leading- and trailing-edges was first tested on periodic (infinitely wide) wings at buffet conditions and it was found that wavy leading-edges are successful in suppressing the instability, while wavy trailing-edges have little or not effect. Wavy leading-edges have therefore been applied to finite wings at buffet conditions and the effect of different characteristic parameters (i.e. waviness amplitude and wavelength, waviness spanwise starting location) has been investigated. Wavy leading-edges on finite wings seem to be less effective in suppressing buffet, but the amplitude of the shock-oscillations is anyway reduced.

跨性别自助餐是一种不稳定的特征，其特征是在跨多个条件下在飞机翅膀上发生的周期性自我维持的冲击振荡，以增加攻击角度。控制和抑制自助餐可以在改善飞机的整体性能和安全性方面产生重大影响。为了控制自助餐，我们在这里提出了带有波浪状领先和尾随边缘的机翼，以模仿座头鲸胸鳍的性能增强功能。首先在自助餐条件下对周期性（无限宽）翅膀进行了波浪状铅和尾随的作用，发现波浪状的前沿在抑制不稳定性方面取得了成功，而波浪状的拖尾边缘几乎没有影响。因此，在自助餐条件下已将波浪状的领先物应用于有限的翅膀，并且已经研究了不同特征参数（即波浪幅度和波长，波动性的启动位置）的影响。有限翅膀上的波浪形前沿似乎在抑制自助餐方面效果较差，但无论如何减少了冲击振荡的幅度。