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Michalke, Alfons (1970) A Note on the Spatial Jet-Instability of the Compressible Cylindrical Vortex Sheet. DLR-Forschungsbericht. Deutsche Forschungs-und Versuchsanstalt für Luft- und Raumfahrt. 18 S.
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Abstract
The instability of compressible circular jets with respect to spatially growing disturbances is the subject of this note. The linearized inviscid disturbance equations have been derived for a compressible circular jet with variable temperature and density profile. The eigenvalues of the instability problem for the cylindrical vortex sheet have been computed and discussed for various Strouhal numbers, Mach numbers and temperature ratios. It is found that contrary to temporal amplification the phase velocity of spatially growing disturbances can exceed the jet velocity. Furthermore, additional disturbance modes exist in the spatial case.
| Item URL in elib: | https://elib.dlr.de/63061/ | ||||||||
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| Document Type: | Monograph (DLR-Forschungsbericht) | ||||||||
| Title: | A Note on the Spatial Jet-Instability of the Compressible Cylindrical Vortex Sheet | ||||||||
| Authors: |
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| Date: | April 1970 | ||||||||
| Open Access: | Yes | ||||||||
| Number of Pages: | 18 | ||||||||
| Publisher: | Deutsche Forschungs- und Versuchsanstalt für Luft-und Raumfahrt, e.V. | ||||||||
| Series Name: | Deutsche Luft- und Raumfahrt Forschungsbericht | ||||||||
| ISSN: | 1434-8454 | ||||||||
| Status: | Published | ||||||||
| Keywords: | Instability, jet, vortex sheet, spatial instability, jet-instability | ||||||||
| Institution: | Deutsche Forschungs-und Versuchsanstalt für Luft- und Raumfahrt | ||||||||
| Department: | Institut für Turbulenzforschung | ||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||
| HGF - Program: | other | ||||||||
| HGF - Program Themes: | other | ||||||||
| DLR - Research area: | Aeronautics | ||||||||
| DLR - Program: | L - no assignment | ||||||||
| DLR - Research theme (Project): | L - no assignment (old) | ||||||||
| Location: | Berlin-Adlershof | ||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | ||||||||
| Deposited By: | Michel, Prof. Dr.-Ing. Ulf | ||||||||
| Deposited On: | 08 Feb 2010 08:56 | ||||||||
| Last Modified: | 31 Jul 2019 19:27 |
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