Purpose of the course

For investigations of pressure or temperature distri­butions on wind-tunnel model surfaces with high spatial resolution, advanced experimental techniques such as Pressure-Sensitive Paint (PSP) or Temperature-Sensitive Paint (TSP) are required. Using these non-intrusive optical measurement techniques, spatial structures and/or rapid temporal or spatial changes of aerodynamic phenomena (shocks on pitching airfoils in transonic flows, coherent structures, transition from laminar to turbulent flow etc.) can be in­vestigated. Recently an increasing number of scientists and engineers has started to utilise the PSP and TSP techniques to investigate pressure and temperature distributions in transonic, low speed, hypersonic and cryogenic wind tunnels, as well as in turbo machines. The PSP and TSP techniques have also evolved from the measurement of steady state pressures and temperatures to include both periodic and unsteady phenomena, thus enabling the study the instantaneous pressure and temperature fields in various areas of fluid mechanics. This course, which is the 11th one on PSP and TSP organized by DLR Göttingen, Germany, will focus on both measurement techniques and aspects of the theory of PSP and TSP relevant to applications. In addition to lectures on the fundamental aspects of PSP and TSP systems, emphasis is placed on the presentation of practical and reliable solutions for problems faced during the implementation of the technique in wind tunnels and other test facilities. During practical sessions in the course, the participants will have the opportunity of carrying out experiments in small groups on PSP/TSP characterisation, coating technique, and the recording and evaluation of PSP/TSP data. Recent developments of the PSP and TSP techniques will be discussed and demonstrated.

The participants are warmly invited to prepare a poster to present their special interest in PSP or TSP, which also can be helpful for discussions with experts about special technical aspects.