Laser-induced fluorescence thermometry of supercritical Co2 flows inside a micro-channel

This work demonstrates a thermometric technique using laser-induced fluorescence (LIF) in supercritical carbon dioxide flows in a micro-channel. Rhodamine 6G was used as a temperature-sensitive fluorescent dye. The flow conditions were at a pressure of 7.9 MPa and temperature in the range of 23 degrees-90 degrees C. 2D spatial distributions and time-resolved temperature profiles were obtained at this high pressure. Measured LIF signals showed close relations to the temperatures obtained from resistance temperature detectors. (C) 2021 Optical Society of America

Automated summary

This work demonstrated a thermometric technique using LIF in supercritical carbon dioxide flows to measure temperatures at high pressures. The temperature-sensitive fluorescent dye used showed good performance, closely related to the temperatures obtained from sensors.