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A four colours line grid schlieren method for quantitative flow measurement

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Abstract

This article describes the schlieren apparatus developed at the Institut für Luftfahrttechnik und Leichtbau (ILT, Institute of Aeronautics and Structures) for the Transonic Wind Tunnel of the Munich University of the Federal Armed Forces (TWM). Special features are the application of four separate, variously coloured beams of rays to identify the direction of density gradients and the line grids which are attached to the knife edges, in order to permit a quantitative evaluation of the amount of ray deflection and of the thermodynamical quantities.

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Abbreviations

c :

sensitivity

h :

light deflection

M :

Mach number

s :

distance

O :

order of schlieren lines

T :

spacing of the line grids

x :

horizontal direction

z :

vertical direction

α:

angle of attack

ϕ :

angle of light deflection

ϱ:

density

References

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Author notes

  1. H. Scheitle

    Present address: Motoren- und Turbinen-Union München GmbH, D-8000, 50, München, F.R.Germany

Authors and Affiliations

  1. Institut für Luftfahrttechnik und Leichtbau, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, D-8014, Neubiberg, F. R. Germany

    H. Scheitle & S. Wagner

Authors
  1. H. Scheitle
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  2. S. Wagner
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Scheitle, H., Wagner, S. A four colours line grid schlieren method for quantitative flow measurement. Experiments in Fluids 9, 333–336 (1990). https://doi.org/10.1007/BF00188763

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