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Velocity and Density Determination by the Electron Beam Technique

Hirai, E. and Bütefisch, K.-A. and Dankert, C. (1993) Velocity and Density Determination by the Electron Beam Technique. In: A. Bortier (ed.), New Trends in Instrumentation for Hypersonic Research, Vol. 224, 361-371, 1993., pp. 361-371. Kluwer Academic Publishers. Printed in the Netherlands..

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Abstract

In aerothermodynamic gas flows the accurate knowledge of the velocity and the density is important as the Mach number is in the hypersonic range and relatively insensitive against real gas effects.This is true especially in the case of rarefied flows if the deviation of the continuum flow condition takes place, viscous effects have to be taken into account, and mixtures of gases have to be considered. In order to get access to these quantities the electron beam technique has been developed for space related research in the hypersonic wind tunnel of the institute. This paper summarizes the main features of the technique concerning density and veloctiy determination, typical experimental set-ups, results of some investigations, and advantages and drawbacks of the technique. Finally, as a new possibility for flow diagnostics an electron photon fluorescence technique using metastable atoms or molecules is discussed.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1993,
Title:Velocity and Density Determination by the Electron Beam Technique
Authors:
AuthorsInstitution or Email of Authors
Hirai, E.UNSPECIFIED
Bütefisch, K.-A.UNSPECIFIED
Dankert, C.UNSPECIFIED
Date:1993
Journal or Publication Title:A. Bortier (ed.), New Trends in Instrumentation for Hypersonic Research, Vol. 224, 361-371, 1993.
Page Range:pp. 361-371
Publisher:Kluwer Academic Publishers. Printed in the Netherlands.
Series Name:Vol. 224
Status:Published
Keywords:Rotation temperature, Relaxation, Hypersonic fLows, Electron beam technique
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
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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