格尼襟翼（GF）是一种简单且有效的翼型增升装置，提升风力机能量转换效率效果明显。然而GF尾涡增强导致的流致振动以及尾涡噪声，是目前设计与应用GF的主要难题。.本项目基于TR-PIV实验测量，辅助数值模拟分析，研究齿形GF几何尺寸与构型在不同流动条件下对尾迹时空演化规律及其对翼面压力脉动的影响。研究将分别考察齿形的形状参数（波长、齿宽等）与流动参数（来流攻角和流动雷诺数），以及展向构型对流场结构的影响，同时与数值模拟对比，揭示尾迹流场特性参数的变化规律。通过对TR-PIV和动态压力传感器测量获得的流动速度场和压力场进行动力学模态分解（Dynamic Mode Decomposition， DMD），重构齿形GF尾迹的时序流场，获得尾涡频谱特性与GF几何参数和流动条件之间的关联，揭示齿形GF尾迹涡的演化规律及其与翼面流动边界层的相互作用机理，为齿形GF的流动控制与减振降噪提供科学理论指导。

Gurney Flap (GF) is a simple and effective device to increase airfoil lift. GF has found important applications in wind turbine energy conversion. However, GF strengthens the wake vortex which induces extra airfoil vibration and noise radiation, and becomes the major obstacle to GF design and application. .This project will be carried out upon the flow measurement by time resolved PIV techniques with assistance of numerical simulation. Effects of GF serration geometry at various flow conditions are investigated on the wake evolution behavior and perturbation of airfoil surface pressure. Geometry is studied for wave length, saw-width, angle and spanwise shaping. Flow conditions are examined on inlet flow angle of attack and Reynolds number. Flow measurements are compared with numerical results to further reveal the variation of flow field features. .DMD method is used to analyze and reconstruct the time resolved velocity and pressure fields of GF wake flow. Spectral features of wake vortex are correlated with GF geometry parameters and flow conditions to disclose the spatial-temporal characteristics of vortex and the mechanism of its interactive effect on airfoil boundary layer. Results are anticipated to instruct flow controlling to reduce wake noise with scientific understanding.