Acoustic impedance of perforated plates in the presence of fully developed grazing flow

The perforated components are widely used in the intake and exhaust mufflers. The coupling between instable shear layer and acoustic fluctuation has a significant influence on the acoustic impedance of perforated components. To obtain practical and precise acoustic impedance of perforated plates in...

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Veröffentlicht in:	Journal of sound and vibration 2020-10, Vol.485, p.115547, Article 115547
Hauptverfasser:	Chen, Zhixiang, Ji, Zhenlin, Huang, Hongpu
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic impedance Acoustics Computational fluid dynamics Convection Diameters Empirical analysis Finite element analysis Flow velocity Fluid dynamics Fluid flow Grazing flow Mach number Mathematical models Muffler Mufflers Numerical analysis Orifices Perforated plate Perforated plates Porosity Reynolds number Shear layers Three dimensional flow Time-domain CFD approach Transmission loss Turbulent boundary layer Vorticity
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