Airfoil Trailing Edge Noise Generation and Its Surface Pressure Fluctuation

• 作者: Weijun Zhu Wenzhong Shen
• 来源期刊: 电力能源(英文)
• 学科: 物理学
• 关键词: LARGE EDDY Simulation Trailing EDGE Noise Surface PRESSURE
• 年，卷（期）: 2015,（7）
• 页码范围: 14-19
• 页数: 6页
• 分类号: O3

摘要

In the present work, Large Eddy Simulation (LES) of turbulent flows over a NACA 0015 airfoil is performed. The purpose of such numerical study is to relate the aerodynamic surface pressure with the noise generation. The results from LES are validated against detailed surface pressure measurements where the time history pressure data are recorded by the surface pressure microphones. After the flow-field is stabilized, the generated noise from the airfoil Trailing Edge (TE) is predicted using the acoustic analogy solver, where the results from LES are the input. It is found that there is a strong relation between TE noise and the aerodynamic pressure. The results of power spectrum density show that the fluctuation of aerodynamic pressure is responsible for noise generation.