𝔖 Bobbio Scriptorium
✦   LIBER   ✦

THE TRANSFER MATRIX FOR A DISSIPATIVE SILENCER OF ARBITRARY CROSS-SECTION

✍ Scribed by R. GLAV

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
239 KB
Volume
236
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

✦ Synopsis

In this work, the acoustic transfer matrix for a cylindrical dissipative silencer of arbitrary cross-section and bulk-reacting lining is derived for the case of negligible mean #ow. The derivation is performed in a two-step procedure. First, the corresponding in"nite-lined duct is analyzed by separating the longitudinal dependence and using collocation for the entailing eigenvalue problem. Then, using the resulting eigenmodes, the acoustic "eld in the silencer is expanded and adjusted to the boundary conditions at the in/outlet by mode-matching. To illustrate the applicability and numerical e$ciency of the proposed technique a practical example is given.

2000 Academic Press

πŸ“œ SIMILAR VOLUMES

COMMENTS ON β€œTHE POINT-MATCHING METHOD O
COMMENTS ON β€œTHE POINT-MATCHING METHOD ON DISSIPATIVE SILENCERS OF ARBITRARY CROSS-SECTION”
✍ P.A.A. Laura; K. RodrΔ±́guez πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 140 KB

The author is to be congratulated for his straightforward solution of this important technical problem [1]. It is also the prupose of this discussion to bring the attention of the interested reader to additional references regarding use of the point-matching method in vibrations and acoustics proble

SIMPLIFIED TECHNIQUES FOR PREDICTING THE
SIMPLIFIED TECHNIQUES FOR PREDICTING THE TRANSMISSION LOSS OF A CIRCULAR DISSIPATIVE SILENCER
✍ R. KIRBY πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 423 KB

A closed-form analytical solution for the transmission loss of a dissipative silencer with a circular cross-section is described. The silencer contains a bulk reacting acoustic absorbent which is separated from a mean gas #ow by a perforated screen. Theoretical predictions of the silencer transmissi

On the dispersion equation for a homogen
On the dispersion equation for a homogeneous, bi-isotropic waveguide of arbitrary cross-section
✍ A. D. Ioannidis; G. Kristensson; D. SjΓΆberg πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 100 KB

## Abstract In this article, we consider the propagation problem inside a waveguide filled with a homogeneous bi‐isotropic material. The cross section of the waveguide is assumed arbitrary. By using the classical theory for the 2D Helmholtz equation in the cross section and the null‐field approach,

A simple estimate for cut-off wave numbe
A simple estimate for cut-off wave number of lowest-order TM mode of a hollow metallic waveguide of arbitrary cross-section
✍ Qinhong Zheng; Li Ma; Fuyao Xie; Jingtian Li πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 97 KB πŸ‘ 2 views

Based on two inequalities, it is presented that the cut-off wave number of the ( ) lowest order transverse magnetic TM mode of a hollow metallic waveguide of arbitrary cross-section is a function of the area, the perimeter and the inscribed circle radius. The results obtained by the derived formulas