| 包含平均旋流的圆环管道声传播的模态分析 |
| |
| 引用本文： | 管莹,王同庆,赵小见.包含平均旋流的圆环管道声传播的模态分析[J].航空动力学报,2008,23(10):1875-1881. |
| |
| 作者姓名： | 管莹 王同庆 赵小见 |
| |
| 作者单位： | 北京航空航天大学,能源与动力工程学院,北京,100191;北京航空航天大学,能源与动力工程学院,北京,100191;北京航空航天大学,能源与动力工程学院,北京,100191 |
| |
| 摘 要： | 通过对三维线化欧拉方程的特征模态分析,研究包含平均旋流情况下声波在敷设声衬的圆环管道中的传播.特征模态分析采用谱配置方法计算轴向波数谱及扰动量的分布.当有平均旋流存在时,特征模态谱主要包括近/纯声模态和近/纯对流模态,旋流的存在甚至会改变传播模态个数,从而改变声波传播截止特性.在验证程序正确性的基础上,研究流动参数及声衬对声模态及对流模态的影响.
|
| 关 键 词： | 模态分析 声传播 旋流 声衬 谱配置方法 |
| 收稿时间： | 2007/10/9 0:00:00 |
| 修稿时间： | 2008/2/26 0:00:00 |
Normal mode analysis for the sound propagation in a lined annular duct with mean swirling flow |
| |
| GUAN Ying,WANG Tong-qing and ZHAO Xiao-jian.Normal mode analysis for the sound propagation in a lined annular duct with mean swirling flow[J].Journal of Aerospace Power,2008,23(10):1875-1881. |
| |
| Authors: | GUAN Ying WANG Tong-qing and ZHAO Xiao-jian |
| |
| Institution: | School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
| |
| Abstract: | Sound propagation in a lined annular duct with mean swirling flow was investigated via the normal mode analysis of three-dimensional(3-D) Linearized Euler equations,and was calculated as a generalized eigenvalue problem by a spectral collocation technique.Axial eigenmodes spectrum which are mainly composed of nearly/purely acoustic modes and nearly/purely convected modes with mean swirl and relative unsteady disturbances can then be determined.Mean swirl may even change the number of the propagating acousti... |
| |
| Keywords: | normal mode analysis sound propagation swirling flow liner spectral collocation technique |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
| 点击此处可从《航空动力学报》下载免费的PDF全文 |
|
