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An Analytical Model for Boundary Layer Attenuation of Acoustic Modes in Rigid Circular Ducts With Uniform Flow

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/
Document Type:Article
Title:An Analytical Model for Boundary Layer Attenuation of Acoustic Modes in Rigid Circular Ducts With Uniform Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Weng, ChenyangDLR, AT-TRAUNSPECIFIED
Bake, FriedrichDLR, AT-TRAUNSPECIFIED
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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