Study on Multifactorial Effects Influencing the Critical Hot-Spot Temperature of Emulsified Matrix and Its Thermal Safety

This study focuses on the critical ignition conditions of emulsified matrix, defining the critical hot-spot temperature as the temperature at which the ignition probability of the emulsified matrix reaches 1% under the influence of an internal heat source within a fixed duration. By establishing an experimental system, the critical hot-spot temperature of the emulsified matrix was systematically determined by combining the Langley method with maximum likelihood estimation for statistical analysis. Furthermore, the influence of bubble content and ambient pressure on the critical hot-spot temperature was investigated. The study reveals that the critical hot-spot temperature decreases with increasing ambient pressure (at 1 atm, 2 atm, and 3 atm) and bubble content (at 0%, 1.5%, and 3%). However, under the coupled effects of ambient pressure and bubbles, bubble overflow phenomena may attenuate their influence.