国防科技大学学报Issue(4)：151-157,7.DOI:10.11887/j.cn.201504025
空腔噪声非线性数值模拟
Nonlinear numerical simulation of cavity noise
摘要
Abstract
In order to evaluate the M219 cavity noise at 0. 6,0. 85 and 1. 35 Mach number,nonlinear acoustic solver is combined with Reynolds-averaged Navier-Stokes equations.The flow field of a cavity is calculated by means of Reynolds-averaged Navier-Stokes equations,which contains basic characteristics of average flow field and turbulence statistical average solution of statistics description of turbulence fluctuation.Noise source is refactored by the nonlinear acoustic solver.Spread of pressure fluctuation is simulated precisely.A comparison shows that the simulation results of nonlinear acoustic solver agree well with the experiment results.Compared with detached eddy simulation,nonlinear acoustic solver can greatly reduce the amount of mesh.In addition,the method can provide some reference for internal weapons bay design.关键词
空腔/非线性/噪声源/湍流/内埋弹舱Key words
cavity/nonlinearity/source/turbulence/internal weapons bay分类
航空航天引用本文复制引用
..空腔噪声非线性数值模拟[J].国防科技大学学报,2015,(4):151-157,7.
