دورية أكاديمية
Acoustic wave propagation in a circular cosh duct carrying a mean flow ; Journal of the Acoustical Society of America
| العنوان: | Acoustic wave propagation in a circular cosh duct carrying a mean flow ; Journal of the Acoustical Society of America |
|---|---|
| المؤلفون: | Thompson, Charles, Sen, Rahul |
| المساهمون: | Biomedical Engineering and Mechanics, Virginia Tech. Engineering Science and Mechanics Department, University of Lowell. Department of Electrical Engineering |
| بيانات النشر: | Acoustical Society of America |
| سنة النشر: | 1987 |
| المجموعة: | VTechWorks (VirginiaTech) |
| مصطلحات موضوعية: | Acoustic wave propagation, Acoustic waveguides, Acoustical effects, Duct flows, Sound pressure |
| الوصف: | An analysis of acoustic wave propagation in a waveguide carrying an incompressible mean flow is presented. The radius of the waveguide is taken to vary slowly as a function of axial location. It is shown that the dynamic behavior of the enclosed fluid can be parametrized by the small parameter where is the ratio of the typical duct radius R 0 and the wall wavelength L 0. An analytical solution for the pressure field in the duct is given in terms of a regular perturbation expansion in The method of matched asymptotic expansions is used to evaluate the refractive effect of a thin mean-flow boundary layer on the acoustic pressure field. It is shown that in the case where the duct geometry conforms to that of a circular cosh duct the effect of higher-order turning points in the wave equation can be effectively handled by a closed-form solution that approximately solves the governing equations. The results of analysis are compared to those obtained using numerical methods. 1987 Acoustical Society of America ; National Science Foundation (U.S.) - Grant MEA-8404776 ; University of Lowell. Analog Devices Professorship |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 8 pages; application/pdf |
| اللغة: | English |
| تدمد: | 0001-4966 |
| العلاقة: | Thompson, C. & Sen, R. (1987). Acoustic wave propagation in a circular cosh duct carrying a mean flow. Journal of the Acoustical Society of America, 82(3), 1052-1059. doi:10.1121/1.395380; http://hdl.handle.net/10919/52740Test; http://scitation.aip.org/content/asa/journal/jasa/82/3/10.1121/1.395380Test; https://doi.org/10.1121/1.395380Test |
| DOI: | 10.1121/1.395380 |
| الإتاحة: | https://doi.org/10.1121/1.395380Test http://hdl.handle.net/10919/52740Test |
| حقوق: | In Copyright ; http://rightsstatements.org/vocab/InC/1.0Test/ |
| رقم الانضمام: | edsbas.92486D0E |
| قاعدة البيانات: | BASE |
| تدمد: | 00014966 |
|---|---|
| DOI: | 10.1121/1.395380 |