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Measurement of hinge moments and model deformations in wind tunnels by means of Moir'e interferometry

Baumann, P.H. and Bütefisch, K.-A. (1995) Measurement of hinge moments and model deformations in wind tunnels by means of Moir'e interferometry. In: SPIE Proceedings Article, 2546, pp. 16-32. SPIE International Symposium on Optical Science, Engineering and Instrumentation, San Diego, CA. USA, 9.-14.7.1995.

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Abstract

A non-intrusive Moire interferometry system has been designed to acquire the instantaneous deformation of models during wind tunnel testing. The resulting interferograms are evaluated without manual intervention using a technique based on the Fourier Transform. The deferomation of a large-scale model wing (generic model of a transport aircraft with a full span of 3.40 m) has been measured in the 8m x 6 m test section of the subsonic Deutsch- Niederlaendischer-Windkanal (DNW). At 400 individual locations along the span, the bending and twist deformation of the wing have been measured with an average accuracy of +- 0.1 mm and +-0.03, respectively. In a second experiment, the bending angle of a lap of a hypersonic vehicle was measured in order to determine the hinge moment due to aerodynamic loads. The experiment was carried out in the transonic wind tunnel Goettingen (TWG). To obtain data for comparison, the hinges were equipped with strain gauges. The results of both techniques show a maximum deviation of 0.02.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1995, pages=17,
Title:Measurement of hinge moments and model deformations in wind tunnels by means of Moir'e interferometry
Authors:
AuthorsInstitution or Email of Authors
Baumann, P.H.UNSPECIFIED
Bütefisch, K.-A.UNSPECIFIED
Date:1995
Journal or Publication Title:SPIE Proceedings Article
Volume:2546
Page Range:pp. 16-32
Status:Published
Keywords:Moire interferometry, interferogram evaluation, hinge moment, model deformation, wing twist, wing bending
Event Title:SPIE International Symposium on Optical Science, Engineering and Instrumentation, San Diego, CA. USA, 9.-14.7.1995
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L SI - Versuchs- und Simulationstechniken
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 10:08

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