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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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)|
|Title:||Planar and Conical Boundary Layer Stability Experiments at Mach 5|
|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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