[Impédance terminale d'un tuyau cylindrique ouvert à fort niveau sonore]
L'étude porte sur les effets acoustiques non-linéaires localisés à la sortie d'un tube cylindrique. Des mesures de l'impédance terminale réalisées à l'aide d'une méthode à deux microphones montrent que les pertes – partie réelle de l'impédance terminale – augmentent avec la vitesse moyenne en sortie de tube. L'importance de ces pertes dépend fortement du rayon de courbure des bords intérieurs à la sortie de tube. Les pertes peuvent être interprétées comme la conséquence de la séparation de l'écoulement acoustique en sortie de tube. Pour les faibles rayons de courbure, plusieurs régimes sont mis en évidence.
The study deals with nonlinear acoustical effects localised at the open-end of a cylindrical tube. The termination impedance is measured using a two microphone method. Due to the separation of the acoustic flow at the pipe end, the real part of the termination impedance depends on the volume velocity at the open end. It is shown that the radius of curvature of the edges of the open end of the tube has a crucial influence on the amplitude of the nonlinear losses. Several regimes are shown for the low radii of curvature.
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Publié le :
Mot clés : Acoustique, Guide d'onde, Impédance de rayonnement, Non-linéaire
@article{CRMECA_2004__332_4_299_0,
author = {M\'erouane Atig and Jean-Pierre Dalmont and Jo\"el Gilbert},
title = {Termination impedance of open-ended cylindrical tubes at high sound pressure level},
journal = {Comptes Rendus. M\'ecanique},
pages = {299--304},
publisher = {Elsevier},
volume = {332},
number = {4},
year = {2004},
doi = {10.1016/j.crme.2004.02.008},
language = {en},
}
TY - JOUR AU - Mérouane Atig AU - Jean-Pierre Dalmont AU - Joël Gilbert TI - Termination impedance of open-ended cylindrical tubes at high sound pressure level JO - Comptes Rendus. Mécanique PY - 2004 SP - 299 EP - 304 VL - 332 IS - 4 PB - Elsevier DO - 10.1016/j.crme.2004.02.008 LA - en ID - CRMECA_2004__332_4_299_0 ER -
Mérouane Atig; Jean-Pierre Dalmont; Joël Gilbert. Termination impedance of open-ended cylindrical tubes at high sound pressure level. Comptes Rendus. Mécanique, Volume 332 (2004) no. 4, pp. 299-304. doi : 10.1016/j.crme.2004.02.008. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2004.02.008/
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