Influence of turbulent grazing flow on the impedance of an opening
Technisch Physische Dienst TNO - TH
Nilson, A. (editor)
Boden, H. (editor)
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.
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Boundary layer flow
Proceedings of the Tenth International Congress on Sound and Vibration, 7 July 2003 through 10 July 2003, Stockholm, Conference code: 62825, 3303-3310