Additional Developments of the Optical Pressure Measurement System (OPMS) for Non-flat Models and Unsteady Flow Conditions

After the first demonstration tests performed together with the developers of the OPMS system in January 1991 and after the presentation of these results at the 14th ICIASF Congress in RockviIle, USA [l], the DLR started additional tests on her own. The first step was to optimize the video camera and illumination system for measurements on model surfaces with curved and rounded parts, the next step was to change the spraying technique of the pressure-sensitive paint. DLR has accompanied all these investigations by simultaneous measurements using the conventional pressure technique for a common and comparative evaluation. Furthermore first tests for unsteady pressure measurements were made.