Simultaneous 3D Surface Geometry and Pressure Distribution Measurement

This chapter describes an aerodynamic measurement technique that is capable of simultaneously characterising 3D model geometry and surface pressure distribution with single light-field camera. This technique combines the traditional intensity-based pressure-sensitive paint (PSP) with light-field imaging and requires one additional step for 3D geometry reconstruction. Working procedures of the single light-field camera 3D surface pressure measurement technique will be firstly introduced, followed by details on how to retrieve pressure ratio image and 3D model geometry from raw light-field images. Results on a Mach 5 wind tunnel test will be lastly discussed to demonstrate its measurement performance.