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

Abstract: 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(BANS)equations arc solved by finite volume method.Acoustic perturbation equations are Bolved by finite difference method.Numerical scheme is a dispersion-relation-preserving(DRP)scheme.Non-reflection far.field boundary eonditions 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.

Key words: computational fluid dynamics, computational aeroaeoustics, acOUStiC perturbation equations, stochastic model, trailing edge noise