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Rein, Martin and Klinkov, Konstantin (2007) On oscillating shock layers of supersonic impinging jets. In: 60th Annual Meeting of the Division of Fluid Dynamics. 60th Annual Meeting of the Division of Fluid Dynamics, [2007-11-18 - 2007-11-20], Salt Lake City (USA). (Unpublished)
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Abstract
Shock layers of supersonic jets impinging on a plate are studied by means of multi-exposure photography and synchronized pressure measurements performed at the stagnation point on the plate. At certain nozzle-to-plate distances the bow shock formed ahead of the plate oscillates strongly. The pressure variations are strongly correlated with the oscillating shock. Peak frequencies are determined by a spectral analysis of the pressure signal. The spectra show a characteristic dependence of the peak frequencies on the nozzle-to-plate distance. The behavior of the primary peaks depends strongly on the characteristics of the supersonic jet (over/underexpansion). Frequencies of secondary peaks that decrease about inversely with the nozzle-to-plate distance, depend only little on the characteristics of the jet. In addition, low frequency bursts that occur for certain nozzle-to-plate distances are traced to the formation and destruction of a recirculation bubble.
| Item URL in elib: | https://elib.dlr.de/50252/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | On oscillating shock layers of supersonic impinging jets | |||||||||
| Authors: |
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| Date: | 2007 | |||||||||
| Journal or Publication Title: | 60th Annual Meeting of the Division of Fluid Dynamics | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Unpublished | |||||||||
| Keywords: | supersonic jet, shock wave, shock layer, recirculation bubble | |||||||||
| Event Title: | 60th Annual Meeting of the Division of Fluid Dynamics | |||||||||
| Event Location: | Salt Lake City (USA) | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | [2007-11-18 - 2007-11-20] | |||||||||
| Organizer: | American Physical Society | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | Aircraft Research (old) | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L AR - Aircraft Research | |||||||||
| DLR - Research theme (Project): | L - Flight Physics (old) | |||||||||
| Location: | Göttingen | |||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > High Speed Configurations | |||||||||
| Deposited By: | Rein, Prof.Dr. Martin | |||||||||
| Deposited On: | 06 Aug 2007 | |||||||||
| Last Modified: | 15 Jan 2010 01:22 |
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