PSP measurements of the pressure fields over the a complicated model configuration

Surface pressure of a complicated space shuttle type model has been measured by using the pressure sensitive paint (PSP) in the ISAS/JAXA transonic large-scale wind tunnel. A new automatic marker detection method is has been developed so that all markers on the model are accurately detected for efficient the image registration. Enough number of the markers was successfully detected to estimate the model displacement during wind-on accurately. As a result, surface pressure distribution over the model was successfully obtained by the PSP measurement. Also, coordinates of the model surface are measured by the equipment of the configuration measurement for measured surface pressure mapping so that aerodynamic forces obtained by the mapped surface pressure can be compared with the balance measurement data.