航空学报 > 2003, Vol. 24 Issue (1): 6-9

二维平行剪切层声波产生和辐射的数值模拟

李晓东, 高军辉   

  1. 北京航空航天大学407教研室 北京 100083
  • 收稿日期:2002-01-21 修回日期:2002-06-15 出版日期:2003-02-25 发布日期:2003-02-25

Numerical Simulation of Sound Generation and Radiation from a 2D Parallel Shear Layer

LI Xiao-dong, GAO Jun-hui   

  1. Faculty 407; Beijing University of Aeronautics and Astronautics; Beijing 100083; China
  • Received:2002-01-21 Revised:2002-06-15 Online:2003-02-25 Published:2003-02-25

摘要: 在二维线化Euler 方程的基础上解决了第3 届计算气动声学专题讨论会的第5 类标准问题: 二维平行剪切层声波的产生和辐射。频散相关保持有限差分格式用于空间离散, 低频散低耗散的龙格库塔法用于时间积分。重点使用了远场无反射边界条件。计算结果与NASA GLENN 研究中心的解析解符合得很好。

关键词: 计算气动声学, 高阶格式, 无反射边界条件, 剪切层, 不稳定波

Abstract: The category 5 problem - Generation and Radiation of Acoustic Waves from a 2-D Shear Layer. is solvedbased on the 2-D linearized Euler equation. T he dispersion-relation-preserving (DRP) finite difference scheme is applied for spatial discretizat ion and the low-dissipation and low-dispersion Runge-Kutta( LDDRK) scheme is ut ilizedfor the t ime integration. Special attent ion is paid to t he implementation of the non-reflect ing far2field boundary coodit ions. The numerical results agree well with the analytical solutions provided by NASA GLENN research center.

Key words: computational aeroacoustics, high order schemes, non reflecting boundary conditions, shear layer, instability wave

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