Normal mode analysis for the sound propagation in a lined annular duct with mean swirling flow

Ying Guan*, Tong Qing Wang, Xiao Jian Zhao

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

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 acoustic modes, and consequently affect the cut-on/cut-off characteristics of sound propagation. After validation of the approach, the effects of flow parameters and liner on the acoustic modes and convected modes are discussed.

源语言英语
页(从-至)1875-1881
页数7
期刊Hangkong Dongli Xuebao/Journal of Aerospace Power
23
10
出版状态已出版 - 10月 2008
已对外发布

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