Title
Influence of turbulent grazing flow on the impedance of an opening
Author
Golliard, J.
Technisch Physische Dienst TNO - TH
Contributor
Nilson, A. (editor)
Boden, H. (editor)
Publication year
2003
Abstract
In this paper, the impedance of a rectangular opening submitted to a turbulent grazing flow is investigated experimentally. The opening is located in a flat plate where a turbulent boundary layer flow develops. The impedance is measured with a two-microphone measuring pipe installed below the opening. The opening has a rectangular shape of large aspect ratio. With the long side oriented perpendicular to the flow. The results, the contribution due to the flow of the acoustic resistance and length correction, are non-dimensionalized and compared with equivalent values computed with a vortex-sheet model.
Subject
Machines
Acoustic fields
Acoustic impedance
Acoustic noise
Approximation theory
Boundary layer flow
Computational methods
Damping
Heat convection
Mathematical models
Pressure drop
Resonators
Acoustic energy
Acoustic resistance
Shear layers
Strouhal number
Turbulent flow
To reference this document use:
http://resolver.tudelft.nl/uuid:b923c8be-76fe-45e7-bcc1-326c6c970b71
TNO identifier
237480
Source
Proceedings of the Tenth International Congress on Sound and Vibration, 7 July 2003 through 10 July 2003, Stockholm, Conference code: 62825, 3303-3310
Document type
conference paper