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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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 | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
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 (old), 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: | 28 Nov 2023 09:33 |
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