Abstract
In this study, the temperature distribution inside PMMA with 5 mm thickness during the flame spread was measured experimentally and the feature of heat transfer was discussed. The temperature measurement was conducted by a novel method that is phosphor thermometry based on the two-color photoluminescence intensity ratio obtained from up-conversion phosphors. The temperature measured by this phosphor thermometry showed a good agreement with that measured by the thermocouple, so that this method gave a non-contact and fine measurement of the temperature distribution inside PMMA. The heat flux analysis with the measured temperature distribution revealed that the heat transfer from the flame to PMMA governed the flame propagation.
