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Theoretical and experimental study of quasisteady‐flow separation within the glottis during phonation. Application to a modified two‐mass model
Most flow models used in numerical simulation of voiced sound production rely, for the sake of simplicity, upon a certain number of assumptions. While most of these assumptions constitute reasonableExpand
Quasisteady aero-acoustic response of orifices.
The low frequency response of orifices (slit, circular diaphragm, and perforated plate) in the presence of mean flow is well predicted by a quasisteady theory. A refinement is brought to the theoryExpand
The whistling potentiality of an orifice in a confined flow using an energetic criterion
Using a two-source method, the scattering matrices of 10 sharp-edged thin orifices are measured under different subsonic flow conditions. The data are analysed in terms of net acoustical energyExpand
Failure of the Ingard-Myers boundary condition for a lined duct: an experimental investigation.
  • Y. Renou, Y. Aurégan
  • Physics, Medicine
  • The Journal of the Acoustical Society of America
  • 19 July 2011
This paper deals with experimental investigation of the lined wall boundary condition in flow duct applications such as aircraft engine systems or automobile mufflers. A first experiment, based on aExpand
Abstract A theoretical and experimental study is presented of the aeroelastic instability of the human soft palate, which can explain the occurrence of snoring. The soft palate is modelled by a beamExpand
PIV and LDV evidence of hydrodynamic instability over a liner in a duct with flow
The acoustical behavior and the flow in a rectangular lined channel with grazing flow have been investigated. The liner consists of a ceramic structure of parallel square channels and is locallyExpand
Influence of grazing flow and dissipation effects on the acoustic boundary conditions at a lined wall
The problem of sound propagation near a lined wall taking into account mean shear flow effects and viscous and thermal dissipation is investigated. The method of composite expansion is used toExpand
Modelling of sound propagation in a non-uniform lined duct using a Multi-Modal Propagation Method
Liner non-uniformities, such as distributed impedances, may have a direct influence on the performance of turbofan engine liners. A relevant problem to study these effects is that of soundExpand
Effect of turbulent eddy viscosity on the unstable surface mode above an acoustic liner
Lined ducts are used to reduce noise radiation from ducts in turbofan engines. In certain conditions they may sustain hydrodynamic instabilities. A local linear stability analysis of the flow in a 2DExpand
Determination of the acoustical energy dissipation / production potentiality from the acoustical transfer functions of a multiport
The acoustic energy conservation law in presence of flow can be very effectively expressed with the help of two variables: the acoustic mass velocity and the acoustic exergy. The minimal and maximalExpand