Application of Pressure Sensitive Paint (PSP) for Determination of the Pressure Field and Calculation of Forces and Moments of Models in a Wind tunnel

Abstract

Visualization and measurements of aerodynamic effects on the three-dimensional aircraft model were conducted using an optical pressure measurement system, based on the Pressure Sensitive Paint (PSP) technique. The PSP technology provides a good understanding of the flow around the wind tunnel model. The PSP technique can be used to carry out absolute pressure measurements on a surface of a model and in addition to evaluate quantitative aerodynamic flow phenomena using scientific grade cameras and image processing techniques. Surface pressures from top, bottom, left and right viewing directions as shown in figure 1 were obtained using the DLR-PSP system on the entire surface which can be captured by eight CCD-cameras. Finally, the measured pressures can be integrated to calculate forces and moments of the complete model or on separate model parts.