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Entropy-Layer Instabilities in Plane Supersonic Flow

Dietz, G. and Mählmann, S. and Hein, S. (1999) Entropy-Layer Instabilities in Plane Supersonic Flow. In: New Results in Numerical and Experimental Fluid Mechanics II, 72, pp. 108-115. Vieweg. AG STAB Symposium, Berlin, 10.-12. November 1998. ISBN 3-528-03122-0.

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Abstract

Entropy-layer instabilities in the supersonic flow over a blunt flat plate are investigated. Two types of entropy-layer instabilities are identified with the linear, local, parallel stability theory. The most amplified mode is a two-dimensional one. In order to validate the numerical findings experiments were carried out: The computed steady, laminar mean-flow data agree with experimentally obtained mass-flow and Pitot-pressure distributions. The wall-normal distribution of the mass-flow eigenfunction of the most amplified entropy-layer instability is found in hot-wire data. The streamwise wave number and the wall-normal phase distribution of the numerically obtained density eigenfunctions agree with a Schlieren picture

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2000,
Title:Entropy-Layer Instabilities in Plane Supersonic Flow
Authors:
AuthorsInstitution or Email of Authors
Dietz, G.UNSPECIFIED
Mählmann, S.UNSPECIFIED
Hein, S.UNSPECIFIED
Date:1999
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics II
Volume:72
Page Range:pp. 108-115
Publisher:Vieweg
Series Name:Notes on Numerical Fluid Mechanics
ISBN:3-528-03122-0
Status:Published
Keywords:supersonic boundary layer, blunted flat plate, entropy-layer instabilities, NOLOT/PSE, flow visulazation, hot-wire measurements
Event Title:AG STAB Symposium, Berlin, 10.-12. November 1998
Organizer:TU Berlin
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
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 20:46

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