Investigation of Aero-Optical Effects in Model Deformation Measurements in a Transonic Flow
- 3.9k Downloads
The influence of strong density gradients on the accuracy of model deformation measurements by means of the Image Pattern Correlation Technique (IPCT) was investigated for a 2D-NACA0010 airfoil in the Transonic Wind Tunnel Göttingen. To ensure a visible aero-optical effect the measurements were performed at Mach 0.8 and 0.85 at angles of attack of up to 5°. Ray tracer simulations based on numerical simulation of the flow were used to optimize the test set-up and to compare the measurement results with the CFD simulations. The measurements performed demonstrate that the view direction of the cameras with respect to the shock has a strong influence whether an aero-optical effect can be observed or not. The comparison with CFD calculations by means of a ray tracer method showed that the ray tracer is an appropriate tool to optimize the experimental set-up.
KeywordsComputational Fluid Dynamics Wind Tunnel Computational Fluid Dynamics Simulation Virtual Displacement Pressure Sensitive Paint
Unable to display preview. Download preview PDF.
- 1.Born, M., Wolf, E.: Principles of Optics, 6th edn. Pergamon Press (1989)Google Scholar
- 3.Gardner, A.D., Richter, K., Rosemann, H.: Prediction of the Wind Tunnel Sidewall Effect for the iGREEN Wing-Tailplane Interference Experiment. In: 16 DGLR-Fach-Symposium der STAB, Aachen, Germany (2008)Google Scholar
- 4.Kirmse, T., Schröder, A., Martinez Schramm, J., Karl, S., Hannemann, K.: Ap-plication of Particle Image Velocimetry and the Background Oriented Schlieren Technique in the High Enthalpy Shock Tunnel Göttingen HEG. In: 27th ISSW, St. Petersburg, Russia (2009)Google Scholar
- 5.Kraus, K.: Photogrammetrie, Band 1. 7. Auflage, de Gruyter (2004)Google Scholar
- 7.Widhalm, M., Ronzheimer, A., Meyer, J.: Lagrangian Particle Tracking on Large Unstructured Three-Dimensional Meshes. In: 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, USA, p. 472 (2008)Google Scholar