Development of three-dimensional highly accurate measurement system of air temperature distribution using Chameleon phosphor

Abstract

In this study, we propose a temperature measurement method that uses ultra-fine fluorescent wires. Reynolds number can be made extremely small by making the wire thin, and it is possible to measure without disturbing the air flow. The surface of the wire was coated with fluorescent paint (Rhodamine B, chameleon phosphor). UV light was used as the light source of visualization. Rhodamine B paint illuminates subtle orange fluorescent light and its the brightness changes with the temperature of air. Chameleon phosphor has the property that its color changes depending on the temperature of the air. Single high sensitivity color camera (ISO 25600, 14 bit, 6,000×4,000 pixels) was used to record the visualized image.