G144 極細蛍光ワイヤーを用いた温度分布の可視化計測法の開発と気流熱量計測への適用(OS-12:先端計測による熱工学の学際的展開(1))

Abstract

In this study, we propose a temperature measurement method that uses ultra-fine fluorescent wires. This is possible because its structure is simple, and any material can be used for the wire. Hence, ultra-fine wires whose Reynolds number is less than 1.0 can be selected. This means that turbulent flow is not generated downstream of the wire and that its wake is negligibly small. Fluorescent paint (containing Rhodamine B) was coated on the surface of the wires. The test volume was illuminated by using UV lights. The paint emits a very tiny orange-colored fluorescent light whose intensity changes with the temperature of the atmosphere. A very high sensitivity color camera (Nikon D7100, ISO 25600, 14 bit, 6,000×4,000 pixels) was used to record the visualized image.