Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles
Acoustic wave propagation in ducts with rigid walls having square-wave wall corrugations is considered in the context of a perturbation formulation. Using the ratio of wall corrugation amplitude to the mean duct half width, a small parameter is defined and a two levels of approximations are obtained...
Main Author: | |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2015-01-01
|
Series: | Mathematical Problems in Engineering |
Online Access: | http://dx.doi.org/10.1155/2015/516982 |
id |
doaj-6e37e0f34fcf4b5d87be1162beabeb9a |
---|---|
record_format |
Article |
spelling |
doaj-6e37e0f34fcf4b5d87be1162beabeb9a2020-11-25T00:31:57ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472015-01-01201510.1155/2015/516982516982Sound Propagation in a Duct with Wall Corrugations Having Square-Wave ProfilesMuhammad A. Hawwa0Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaAcoustic wave propagation in ducts with rigid walls having square-wave wall corrugations is considered in the context of a perturbation formulation. Using the ratio of wall corrugation amplitude to the mean duct half width, a small parameter is defined and a two levels of approximations are obtained. The first-order solution produces an analytical description of the pressure field inside the duct. The second-order solution yields an analytical estimate of the phase speed of waves transmitting through the duct. The effect of wall corrugation density on acoustic impedance and wave speeds is highlighted. The analysis reveals that waves propagating in a duct with square-wave wall corrugation are slower than waves propagating in a duct with sinusoidal wave corrugation having the same corrugation wavelength.http://dx.doi.org/10.1155/2015/516982 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Muhammad A. Hawwa |
spellingShingle |
Muhammad A. Hawwa Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles Mathematical Problems in Engineering |
author_facet |
Muhammad A. Hawwa |
author_sort |
Muhammad A. Hawwa |
title |
Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles |
title_short |
Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles |
title_full |
Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles |
title_fullStr |
Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles |
title_full_unstemmed |
Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles |
title_sort |
sound propagation in a duct with wall corrugations having square-wave profiles |
publisher |
Hindawi Limited |
series |
Mathematical Problems in Engineering |
issn |
1024-123X 1563-5147 |
publishDate |
2015-01-01 |
description |
Acoustic wave propagation in ducts with rigid walls having square-wave wall corrugations is considered in the context of a perturbation formulation. Using the ratio of wall corrugation amplitude to the mean duct half width, a small parameter is defined and a two levels of approximations are obtained. The first-order solution produces an analytical description of the pressure field inside the duct. The second-order solution yields an analytical estimate of the phase speed of waves transmitting through the duct. The effect of wall corrugation density on acoustic impedance and wave speeds is highlighted. The analysis reveals that waves propagating in a duct with square-wave wall corrugation are slower than waves propagating in a duct with sinusoidal wave corrugation having the same corrugation wavelength. |
url |
http://dx.doi.org/10.1155/2015/516982 |
work_keys_str_mv |
AT muhammadahawwa soundpropagationinaductwithwallcorrugationshavingsquarewaveprofiles |
_version_ |
1725321598109483008 |