Application of Moire Interferometry for Model Deformation Measurements in Large Scale Wind Tunnels
by
Dieter Pallek
DRL, Institute for Fluid Mechanics, Bunsenstr. 10, 37073 Goettingen
Coauthors: P. H. Baumann, K. A. Buetefisch, J. Kompenhans

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 system has been installed in the cryogenic European Transonic Wind Tunnel (ETW). The deformation of a model wing (generic model of a transport aircraft with a full span of 1.60 m) has been measured. In a second experiment, the bending angle of a flap 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).

Date received: February 3, 1999

Copyright © 1999 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cacp-30.