# Quasisteady aero-acoustic response of orifices.

@article{Durrieu2001QuasisteadyAR, title={Quasisteady aero-acoustic response of orifices.}, author={P. Durrieu and G. Hofmans and G. Ajello and R. Boot and Y. Aur{\'e}gan and A. Hirschberg and M. Peters}, journal={The Journal of the Acoustical Society of America}, year={2001}, volume={110 4}, pages={ 1859-72 } }

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 theory by considering a Mach number dependent vena contracta coefficient. The measurements of the vena contracta coefficient of a slit agree well with the simple analytical expression existing in the case of the Borda tube orifice. The measured scattering matrix coefficients do not depend strongly on the… Expand

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