| タイトル | Radiation of cylindrical duct acoustic modes with flow mismatch |
| 著者（英） | Savkar, S. D. |
| 著者所属（英） | General Electric Co. |
| 発行日 | 1975-10-08 |
| 言語 | eng |
| 内容記述 | Motivated by the problem of Mach number and temperature discontinuity mismatch between the tailpipe and the surrounding medium, and the effect of this flow mismatch on aircraft engine noise, the radiation of spinning turbo-acoustic modes from a round duct is investigated. The model, based on a plug flow exhaust jet, solves the convected wave equations using Fourier transforms, inversion being accomplished via a coupled Wiener-Hopf and Carrier-Koiter technique. It is concluded that the Mach number discontinuity results in a conflict between convection and refraction effects, while the temperature mismatch results in a sharp beaming of sound off to the side. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 76A11039 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/445191 |
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