摘要
基于桨涡干扰流动的噪声场分析了 NACA0012翼型的远场气动噪声。采用 Euler 方程计算了 NACA0012、NACA23012、OA207三种翼型的绕流场,选取 Kirchhoff 面选为包围整个翼型的一层网格,通过得到 NACA0012翼型的Kirchhoff 面上在桨尖涡干扰流动下的近场解,根据 Kirchhoff 方法求解远场声压。样例计算分析体现出:在计算桨涡干扰噪声时,旋翼 CFD 技术与 Kirchhoff 方法相结合的良好效果。
The flow fields around NACA0012、NACA23012、OA207 airfoils can be calculated by solving Euler/N-S equations. The far field noise generated by NACA0012 airfoil/vortex interaction is predicted using the combined Euler/Kirchhoff method. Kirchhoff surface is selected as one of the grid surfaces.Firstly,the result of nearfield can be obtained by solving Euler equations. Then the result of farfield can be calculated by Kirchhoff method.Finally,the combined Euler/Kirchhoff method developed here is proved a good try for studying Blade-Vortex Interaction(BVI)noise through sample calculations.
出处
《直升机技术》
2004年第2期10-14,共5页
Helicopter Technique
