Development of PSP Technique for Application on the VFE-2 65° Delta Wing Configuration

Abstract

For the International Vortex Flow Experiment 2 (VFE-2) new wind tunnel tests on a NASA delta-wing model by using modern non-intrusive measurement techniques have been performed in the DNW-TWG (Göttingen) transonic wind tunnel. In order to obtain a good understanding of the flow around the wind tunnel model the PSP (Pressure Sensitive Paint) technique has been applied. The PSP technique can be used to realize absolute pressure measurements on the whole surface of a model using scientific grade cameras and advanced image processing techniques. By means of the planar pressure information of the flow topology can be investigated in more detail than would be possible with data of conventional pressure taps. Surface pressures on the entire surface of the model have been obtained using DLR's mobile PSP system, viewing from top and bottom by means of four CCD-cameras. Finally, the measured pressures have been integrated to calculate forces and moments of the full model.