On the interaction of a sound pulse with the shear layer of an axisymmetric jet

L. Maestrello; A. Bayliss; E. Turkel

doi:10.1016/0022-460X(81)90510-1

On the interaction of a sound pulse with the shear layer of an axisymmetric jet

L. Maestrello^*, A. Bayliss, E. Turkel

^*Corresponding author for this work

Engineering Sciences and Applied Mathematics

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.

Original language	English (US)
Pages (from-to)	281-301
Number of pages	21
Journal	Journal of Sound and Vibration
Volume	74
Issue number	2
DOIs	https://doi.org/10.1016/0022-460X(81)90510-1
State	Published - Jan 22 1981

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Acoustics and Ultrasonics
Mechanical Engineering

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10.1016/0022-460X(81)90510-1

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title = "On the interaction of a sound pulse with the shear layer of an axisymmetric jet",

abstract = "The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.",

author = "L. Maestrello and A. Bayliss and E. Turkel",

note = "Funding Information: .; This work was supported under NASA Contracts No. NASI-14101 and NASl-15810 while the second and third authors were in residence at ICASE, NASA Langley Research Center, Hampton, Virginia 23665. Additional support for the third author was provided under U.S. Air Force Office of Scientific Research Contract No. AFOSR-76-288 1.",

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AU - Maestrello, L.

AU - Bayliss, A.

AU - Turkel, E.

N1 - Funding Information: .; This work was supported under NASA Contracts No. NASI-14101 and NASl-15810 while the second and third authors were in residence at ICASE, NASA Langley Research Center, Hampton, Virginia 23665. Additional support for the third author was provided under U.S. Air Force Office of Scientific Research Contract No. AFOSR-76-288 1.

PY - 1981/1/22

Y1 - 1981/1/22

N2 - The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.

AB - The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.

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On the interaction of a sound pulse with the shear layer of an axisymmetric jet

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