基于SNGR方法的后缘噪声数值模拟  

Simulation of Trailing Edge Noise Based on Stochastic Noise Generation and Radiation Method

作　　者：陈荣钱[1] 伍贻兆[1] 夏健[1] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016

出　　处：《计算物理》2011年第5期698-704,共7页Chinese Journal of Computational Physics

摘　　要：采用随机噪声产生和传播(SNGR)方法对后缘噪声进行数值模拟.SNGR方法结合随机方法和计算流体力学,耗费较少的计算资源就可以预测噪声水平.数值模拟时采用有限体积法求解雷诺平均Navier-Stokes(RANS)方程;采用有限差分法求解声学扰动方程,数值格式采用色散关系保持(DRP)格式,远场边界条件采用无反射边界条件.以二维平板和NACA0012翼型为例,编制程序,与参考结果对比表明,程序可以预测后缘噪声.Simulation of trailing edge noise based on stochastic noise generation and radiation （SNGR） method is shown. The SNGR method combines stochastic method with computational fluid dynamics, which gives acceptable noise result with relatively low computation cost. Reynolds averaged Navier-Stokes （RANS）equations are solved by finite volume method. Acoustic perturbation equations are solved by finite difference method. Numerical scheme is a dispersion-relation-preserving （DRP） scheme. Non-reflection far-field boundary conditions are utilized. A two-dimensional flat plate and an NACA0012 airfoil are simulated and compared with reference results. It is shown that the program predicts correctly trailing edge noise.

关 键 词：计算流体力学 计算气动声学 声学扰动方程 随机模型 后缘噪声 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]