✦ LIBER ✦
LOW FREQUENCY SOUND PROPAGATION IN A COAXIAL CYLINDRICAL DUCT: APPLICATION TO SUDDEN AREA EXPANSIONS AND TO DISSIPATIVE SILENCERS
✍ Scribed by Y. AURÉGAN; A. DEBRAY; R. STAROBINSKI
- Book ID
- 102609318
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 308 KB
- Volume
- 243
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
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.