摘要
采用CFD+CAA的混合方法对三维湍流激励的气动噪声进行了仿真计算。流场计算部分采用有限体积法求解RANS方程,得到定常的背景流场。在流场计算的基础上,基于SNGR(Stochastic Noise Generation and Radia-tion)方法构造声学控制方程LEE的右端源项,采用高阶间断有限元法(DG)求解线性欧拉方程(LEE)得到后视镜的非定常声场。适用于复杂外形的气动噪声仿真计算,是一种非常实用的气动噪声工程计算方法。
In this paper, a hybrid method combining Computational Fluid Dynamics (CFD) with Computational Aeroacoustics (CAA) is used to simulate the flowinduced noise. The RANS equations are solved by the finite volume method to obtain the steadystate flow field. The source term of the LEE is generated by the SNGR (Stochastic Noise Generation and Radiation) method based on the solution of flow. Subsequently, the Highorder Discontinuous Galerkin Method (DG) is used to solve the LEE to provide unsteady noise field.
出处
《航空计算技术》
2012年第6期21-24,共4页
Aeronautical Computing Technique
基金
国家自然科学基金项目资助(11272152)
航空科学基金项目资助(20101552018)
江苏省优势学科基金项目资助