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Bow shock disturbance due to shear layer instability in hypervelocity shock wave interaction

Hannemann, V. and Schnieder, M. and Reimann, B. and Eitelberg, G. (1999) Bow shock disturbance due to shear layer instability in hypervelocity shock wave interaction. In: 22nd International Symposium on Shock Waves, Paper 3450. 22nd International Symposium on Shock Waves, Imperial College London, 18.-23. Juli 1999.

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Abstract

Shock/shock-interaction studies (Carl et al. (1998)) have been conducted numerically and experimentally in the High Enthalpy Shock Tunnel Göttingen (HEG). A cylinder of radius 45mm and a 10 degree wedge are used for shock generation. Freestream conditions with total pressure of approximately 50 and 100 MPa were available. Freestream total enthalpies are around 10-20MJ/kg and Mach numbers are approximately 9 for all conditions; air is used as the test gas. The experimental results are pressented and compared to computations. Additionally, the ideal dissociating gas model of Lighthill has been used to predict the flow conditions downstream of the different waves (Sanderson (1995)). The observed shear layer instabilities and their influence on the shock system are discussed. An enhancing influence of the high enthalpy on the instability is found in comparison to low enthalpy flow at the same Mach number

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Bow shock disturbance due to shear layer instability in hypervelocity shock wave interaction
Authors:
AuthorsInstitution or Email of Authors
Hannemann, V.UNSPECIFIED
Schnieder, M.UNSPECIFIED
Reimann, B.UNSPECIFIED
Eitelberg, G.UNSPECIFIED
Date:1999
Journal or Publication Title:22nd International Symposium on Shock Waves
Volume:Paper 3450
Status:Published
Keywords:Shock-shock interaction, shear layer instability, hypersonic, high enthalpy flow, HEG
Event Title:22nd International Symposium on Shock Waves, Imperial College London, 18.-23. Juli 1999
Organizer:Imperial College
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:40

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