静止介质中点声源远场噪声的数值预测  

Numerical prediction of point source far-field noise in stationary medium

作　　者：吴玲玲[1] 杨爱玲[1] 陈康民[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《能源研究与信息》2006年第3期125-130,共6页Energy Research and Information

基　　金：上海市教委资助项目(05ZZ27);上海市高校优秀青年教师后备人选资助项目(04YQHB141);上海市青年科技启明星计划项目(02QG14031)

摘　　要：采用Kirchhoff方法计算点声源的远场气动噪声。Kirchhoff积分面为包围点声源的固定圆柱面,采用理论解析法得到圆柱面上的近场气动流场解,然后根据Kirchhoff积分公式求解远场声压信息。详细论述了将Kirchhoff积分公式程序化的循环累加法;并着重分析了不同积分面及其网格划分对积分精度的影响。The far-field aerodynamic noise generated by a point source is calculated using the Kirchhoff＇s method. The Kirchhoff＇s surface is a stationary column surface enclosing the point source and the near-field solution is obtained by a theoretical method. Consequently, the far-field pressure is acquired with the kirchhoff＇s integral formulation. In addition, the recursive summation method for programming the kirchhoff＇s integral formulation is discussed in detail. The influence of the integration surface and the grid layout on calculation precision is analyzed.

关 键 词：气动噪声 循环累加法 积分面 网格划分 

分 类 号：O421.2[理学—声学]