Combined Application of Pressure Sensitive Paint and Particle Image Velocimetry to the Flow above a Delta Wing

Abstract

The progress made at the development of modern flow measurement techniques such as Particle-Image Velocimetry (PIV) and Pressure Sensitive Paint (PSP) allow to provide flow data of increased quality and accuracy. Particularly PIV and PSP are able to capture a huge amount of experimental data during a wind tunnel test campaign. PIV provides instantaneous as well as averaged flow velocity fields in different planes of the flow and allows for the detection of large and small spatial flow structures. Using PSP the pressure distribution on a whole surface can be determined giving much more insight in details of the flow topology than would be possible by discrete pressure taps. The combined application of both techniques offers new possibilities for detailed flow investigations but also provides an excellent data base for comparisons with numerical results.