论文信息 - LOW FREQUENCY SOUND PROPAGATION IN A COAXIAL CYLINDRICAL DUCT : APPLICATION TO SUDDEN AREA EXPANSIONS AND TO DISSIPATIVE SILENCERS

LOW FREQUENCY SOUND PROPAGATION IN A COAXIAL CYLINDRICAL DUCT : APPLICATION TO SUDDEN AREA EXPANSIONS AND TO DISSIPATIVE SILENCERS

A method based on the approximation of the radial pressure pro"le is developed to analyze the acoustic performance of a sudden expansion and of an expansion chamber at low frequencies. This model is able to predict very accurately the added length of an expansion which includes neither porous material nor a perforated tube. It can also be applied when a bulk-reacting lining and perforated tube are included. This model of a dissipative silencer gives results which compare very favourably with experimental data. ( 2001 Academic Press

Y. | Gan | AURE | GAN | Auré

[1] M. J. Crocker,et al. Analysis of concentric‐tube resonators having unpartitioned cavities , 1978 .

[2] J. Kergomard,et al. Simple discontinuities in acoustic waveguides at low frequencies: Critical analysis and formulae , 1987 .

[3] H. Saunders,et al. Acoustics: An Introduction to Its Physical Principles and Applications , 1984 .

[4] Denis Lafarge,et al. Dynamic compressibility of air in porous structures at audible frequencies , 1997 .

[5] A. Cummings,et al. Sound attenuation of a finite length dissipative flow duct silencer with internal mean flow in the absorbent , 1988 .

[6] K. S. Peat,et al. A TRANSFER MATRIX FOR AN ABSORPTION SILENCER ELEMENT , 1991 .

[7] Chao-Nan Wang,et al. Numerical decoupling analysis of a resonator with absorbent material , 1999 .

[8] Joel Koplik,et al. Theory of dynamic permeability and tortuosity in fluid-saturated porous media , 1987, Journal of Fluid Mechanics.

[9] Ragnar Glav,et al. The transfer matrix for a dissipative silencer of arbitrary cross-section , 2000 .