Identifying and correcting optical and camera error sources in fast-psp experiments

Abstract

© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.This paper identifies, characterizes and describes correction procedures for uncertainty sources associated with fast-response pressure sensitive paint (PSP) optical and image acquisition systems, including fixed pattern noise, non-linear CMOS sensor response and optical vignetting. Data on a typical CMOS camera was acquired using an easy to manufacture integrating sphere, and image correction procedures were developed having a typical wind tunnel environment in mind. For validation, corrections were applied to data on pressure distribution over a NACA 0012 airfoil in transonic flow. A significant improvement in data accuracy was observed.