Comparison of pyrometry and thermography for thermal analysis of thermite reactions

This study examines the thermal behavior of a laser ignited thermite composed aluminum and bismuth trioxide. Temperature data were collected during reaction using four-color pyrometer high-speed color camera modified for thermography. The two diagnostics arranged to collect simultaneously, with similar fields view acquisition rates, so that techniques could be directly compared. Results show at initial final stages reaction, lower signal-to-noise ratio affects accuracy measured temperatures. Both captured same trends in transient behavior, but average temperatures thermography about 750 K higher than those from pyrometer. difference was attributed dynamic range camera’s image sensor, which unable resolve cooler field as well photomultiplier tube sensors Overall, while not accurately capture temperature scene, its ability peak spatial make it preferred method tracking reactions.