一种可用于声衬优化设计的管道声传播有限元模型

卢镇波; 景晓东; 孙晓峰

一种可用于声衬优化设计的管道声传播有限元模型

北京航空航天大学, 能源与动力工程学院, 北京 100083

基金项目: 霍英东青年教师基金(91052);航空基金(04C51031)

计量
- 文章访问数: 1615
- HTML浏览量: 95
- PDF量: 534
- 被引次数: 0
出版历程
- 收稿日期: 2006-08-08
- 修回日期: 2006-12-28
- 刊出日期: 2007-08-28

A finite element model of sound propagation in flow duct with its application to linear optimization

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 以航空发动机消声短舱声学设计为目标, 发展了一种管道声传播有限元模型, 它包含了壁面声阻抗、管道截面积和形状变化、以及管内非均匀流动等典型影响因素.应用该模型针对一种真实的高速转子声源进行了管道消声的数值模拟, 不仅得到了细致的管内声场分布情况, 更利用其快速的特点完成了声衬声阻抗的优化计算.结果表明该模型具有工程应用价值.
- 航空、航天推进系统 /
- 航空发动机消声短舱 /
- 管道声学 /
- 声衬 /
- 有限元方法
Abstract: A finite element model is presented for sound propagation in a flow duct with an acoustic liner, which incorporates the major practical effects of wall impedance, variable duct geometry and non-uniform flow.This model is applied to simulate the duct liner effect on reducing the noise of a real high-speed rotor.Both the distribution andreduction of the sound pressure inside the duct and the optimized liner impedance are obtained.The results show that the present model can be used for the design purpose of a duct liner in the practical engineering applications.
- aerospace propulsion system /
- aeroengine nacelle /
- duct acoustics /
- acoustic liner /
- finite element method

HTML

参考文献(9)

[1]	Astley R J,Eversman W.A finite element method for transmission in non-uniform ducts without flow:comparision with the method of weighted residuals[J].Journal of Sound and Vibration,1978,57(3):367-388.
[2]	Astley R J,Eversman W.Finite element formulations for acoustical radiation[J].Journal of Sound and Vibration,1983,88(1):47-64.
[3]	Danda R I,Eversman W.Improved finite element modeling of the turbofan engine inlet radiation problem[J].ASME Journal of Vibration and Acoustics,1995,117:109-115.
[4]	Eversman W.The boundary condition at an impedance wall in a nonuniform duct with potential flow[J].Journal of Sound and Vibration,2001,246 (1):63-69.
[5]	Rienstra S W,Eversman W.A numerical comparison between the multiple-scales and finite-element solution for sound propagation in lined flow ducts[J].Journal of Fluid Mechanics,2001,437:367-384.
[6]	Myers M K.On the acoustic boundary condition in the presence of flow[J].Journal of Sound and Vibration,1980,71(3):429-434.
[7]	Cantrell R H,Hart R W.Interaction between sound and flow in acoustic cavities:mass momentum and energy considerations[J].Journal of the Acoustical Society of America,1964,36(4):694-704.
[8]	Utsumi M.An efficient method for sound transmission in non-uniform circular ducts[J].Journal of Sound and Vibration,1999,227(4):735-748.
[9]	王晓宇,杜林,孙晓峰.考虑变截面影响的航空发动机短舱声学模型及数值结果[J].航空学报,2006,27(6):1073-1079.WANG Xiaoyu,DU Lin,SUN Xiaofeng.A new approach for the acoustic design of aeroengine nacelle with the effect of varying cross-section aera[J].Acta Aeronautica Et Astronautica Siniga.2006,27(6):1073-1079.