Visualization and Measurement of Jet Impinging on Surface by Inkjet Printed PSP

Abstract

Pressure-sensitive paint (PSP) is an optical and non-intrusive pressure measurement technique, and is used in wind tunnel testing. In general, PSP is applied to a model surface by a sprayer by hand, resulting in non-uniform layer. Recently, we proposed a novel PSP paint technique using an inkjet printer. This technique enable us to easily paint uniform PSP. In this study, we fabricated a combined PSP and TSP (temperature-sensitive paint) by inkjet printer. PSP and TSP were symmetrically painted on a substrate. Then, we measured the pressure and temperature distribution induced by impingement jet. The obtained pressure distribution was in good agreement with the literature.