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Weng, Chenyang and Bake, Friedrich (2016) An Analytical Model for Boundary Layer Attenuation of Acoustic Modes in Rigid Circular Ducts With Uniform Flow. Acta acustica united with Acustica, 102, pp. 1138-1141. Hirtzel. DOI: 10.3813/AAA.919025 ISSN 1610-1928
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Official URL: http://www.ingentaconnect.com/contentone/dav/aaua/2016/00000102/00000006/art00016
Abstract
An analytical model is derived for the attenuation of fundamental and higher-order (both axisymmetric and non-axisymmetric) acoustic modes caused by viscothermal losses in the acoustic boundary layer. Flow convection effects are included in the modeling by assuming a uniform mean axial velocity profile. The proposed model can be applied to calculate the damping of the acoustic waves propagating in wide circular flow ducts with rigid walls. A simple and effective way of including the mean flow convection in the modeling for the attenuation of the fundamental mode is also suggested.the
| Item URL in elib: | https://elib.dlr.de/107276/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | An Analytical Model for Boundary Layer Attenuation of Acoustic Modes in Rigid Circular Ducts With Uniform Flow | |||||||||
| Authors: |
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| Date: | 1 November 2016 | |||||||||
| Journal or Publication Title: | Acta acustica united with Acustica | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| In SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | Yes | |||||||||
| Volume: | 102 | |||||||||
| DOI : | 10.3813/AAA.919025 | |||||||||
| Page Range: | pp. 1138-1141 | |||||||||
| Publisher: | Hirtzel | |||||||||
| ISSN: | 1610-1928 | |||||||||
| Status: | Published | |||||||||
| Keywords: | duct acoustics, boundary layer attenuation, circular ducts, rigid walls uniform flow, analytical model | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | propulsion systems | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L ER - Engine Research | |||||||||
| DLR - Research theme (Project): | L - Combustion Chamber Technologies, L - no assignment | |||||||||
| Location: | Berlin-Charlottenburg | |||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | |||||||||
| Deposited By: | Bake, Dr.-Ing. Friedrich | |||||||||
| Deposited On: | 04 Nov 2016 08:24 | |||||||||
| Last Modified: | 31 Jul 2019 20:04 |
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