Development of Heat Flux Measurement Method Using Stacked Temperature Sensitive Films

In this paper, a novel method to directly measure the microscale heat flux using stacked temperature sensitive paints (TSPs) is proposed. Two types of TSPs were combined with the optical filter, which enables to measure the temperature difference between the front and back side of the film, eventually the heat flux across the film. The measurement system was developed which independently activates each layer of TSP and measures the luminescence from them. The basic function of the developed method was experimentally demonstrated.