Khujadze, George ; Chagelishvili, George ; Oberlack, Martin ; Tevzadze, Alexander ; Bodo, G.
Hrsg.: Eckhardt, Bruno (2009)
Aerodynamic sound generation by turbulence in shear flows.
In: Advances in Turbulence XII : Proceedings of the 12th EUROMECH European Turbulence Conference
doi: 10.1007/978-3-642-03085-7_208
Buchkapitel, Bibliographie
Kurzbeschreibung (Abstract)
The nonlinear aerodynamic sound generation by turbulence has been long analyzed since the foundation of the theory of aerodynamic sound in pioneering paper by Lighthill 1. Also, it was Lighthill 2 who noted that velocity shear can increase the acoustic wave emission in the aerodynamic situation due to the existence of linear terms in the inhomogeneous part of the analogy equations (second derivative of the Reynolds stress). In 3 it was disclosed and described a linear aerodynamic sound generation mechanism. Specifically, it was shown that the flow non-normality induced linear phenomenon of the conversion of vortex mode into the acoustic wave mode is the only contributor to the acoustic wave production of the unbounded shear flows in the linear regime. From the physical point of view the potential vorticity was identified as the linear source of acoustic waves in shear flows.
| Typ des Eintrags: | Buchkapitel |
|---|---|
| Erschienen: | 2009 |
| Herausgeber: | Eckhardt, Bruno |
| Autor(en): | Khujadze, George ; Chagelishvili, George ; Oberlack, Martin ; Tevzadze, Alexander ; Bodo, G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Aerodynamic sound generation by turbulence in shear flows |
| Sprache: | Englisch |
| Publikationsjahr: | 2009 |
| Ort: | Berlin Heidelberg |
| Verlag: | Springer |
| (Heft-)Nummer: | 132 |
| Buchtitel: | Advances in Turbulence XII : Proceedings of the 12th EUROMECH European Turbulence Conference |
| Reihe: | Springer Proceedings in Physics |
| DOI: | 10.1007/978-3-642-03085-7_208 |
| URL / URN: | http://dx.doi.org/10.1007/978-3-642-03085-7_208 |
| Kurzbeschreibung (Abstract): | The nonlinear aerodynamic sound generation by turbulence has been long analyzed since the foundation of the theory of aerodynamic sound in pioneering paper by Lighthill 1. Also, it was Lighthill 2 who noted that velocity shear can increase the acoustic wave emission in the aerodynamic situation due to the existence of linear terms in the inhomogeneous part of the analogy equations (second derivative of the Reynolds stress). In 3 it was disclosed and described a linear aerodynamic sound generation mechanism. Specifically, it was shown that the flow non-normality induced linear phenomenon of the conversion of vortex mode into the acoustic wave mode is the only contributor to the acoustic wave production of the unbounded shear flows in the linear regime. From the physical point of view the potential vorticity was identified as the linear source of acoustic waves in shear flows. |
| Freie Schlagworte: | Physics |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) |
| Hinterlegungsdatum: | 24 Aug 2011 18:21 |
| Letzte Änderung: | 15 Feb 2019 15:43 |
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