Development and Testing of Temperature Sensitive Particles

Temperature sensitive particles can be used to seed a fluid flow, allowing for non-intrusive velocity and temperature field measurements. Using an avalanche photodiode (APD) with fiber optic setup, the emission intensity of luminescing samples is measured. Changes in the luminescence when subjected to a step temperature input within a shock tube lead to the determination of the time response. Furthermore, temperature and pressure sensitivity analysis is performed using a photomultiplier tube (PMT) survey apparatus. Results for various temperature sensitive particles are presented along with suggestions for application to experimental flows.