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Planar and Conical Boundary Layer Stability Experiments at Mach 5

Wendt, V. and Kreplin, H.-P. and Höhler, G. and Grosche, F.-R. and Krogramm, P. and Simen, M. (1993) Planar and Conical Boundary Layer Stability Experiments at Mach 5. AIAA/DGLR Fifth International Aerospace Planes and Hypersonic Technologies Conference, 30.11.-3.12.93, München.

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Abstract

As part on an investigation on hypersonic boundary layer transition, first sucessful hot-wire and fluctuating pressure measurements have been conducted in the Ludwieg-Tube facility of DLR at Mach number M infinity = 5. The distrubance amplitudes (rms-values) of the fluctuations of Pitot pressure and mass flow are smaller than the values measured in conventional, i.e. continuoulsy driven or blowdown type, hypersonic wind-tunnels. Hot-wire measurements in the laminar boundary layer on a flat plate and on a cone in the same windtunnel at Mach 5 did not show the expected dominance of high-frequency second mode instabilities, as predicted by linear stability theory and found in other experiments. However, the growth of natural disturbances within a broad frequency band up to 50 kHz could be observed on the flat plate. The measured amplification rates are in good agreement with theoretical results for three dimensional first mode disturbances.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1993,
Title:Planar and Conical Boundary Layer Stability Experiments at Mach 5
Authors:
AuthorsInstitution or Email of Authors
Wendt, V.UNSPECIFIED
Kreplin, H.-P.UNSPECIFIED
Höhler, G.UNSPECIFIED
Grosche, F.-R.UNSPECIFIED
Krogramm, P.UNSPECIFIED
Simen, M.UNSPECIFIED
Date:1993
Status:Published
Keywords:Hitzdrahtmeßtechnik, Druckmeßtechnik, Hyperschall, Rohrwindkanal Transition, Instabilität, Strömungsqualität
Event Title:AIAA/DGLR Fifth International Aerospace Planes and Hypersonic Technologies Conference, 30.11.-3.12.93, München
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 > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:07

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