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On oscillating shock layers of supersonic impinging jets

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 (Unpublished)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/
Document Type:Conference or Workshop Item (Speech)
Title:On oscillating shock layers of supersonic impinging jets
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rein, MartinUNSPECIFIEDUNSPECIFIED
Klinkov, KonstantinUNSPECIFIEDUNSPECIFIED
Date:2007
Journal or Publication Title:60th Annual Meeting of the Division of Fluid Dynamics
Open Access:No
In DOAJ: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Status:Unpublished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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