Abstract
The purpose of this study is to investigate the mechanism of heat loss in DI diesel engines via two-dimensional thermography of the combustion chamber wall using laser-induced phosphorescence from a thermographic phosphor. The present paper reports the results of preliminary measurements of instantaneous temperature distribution on a quartz glass plate coated with a thermographic phosphor (La_2O_2S:Eu) heated by an atmospheric jet burner flame. The phosphor-coated glass plate was irradiated by a 355nm Nd:YAG laser pulse and the laser-induced phosphorescence at 620 nm was imaged by a CCD camera. The temperature distribution was obtained from the pixel-by-pixel ratio of phosphorescence intensities at room temperature and the measured temperature.
