Simulation of the Air Bubble Temperature in the Firing Projectile.

It is important to know the process of hot spot creation to improve the safety of working with melted TNT. One of the probabilities is the air bubbles in TNT that melted during the firing and internal ballistics, which are the results of casting problems. Thus, in this paper, the accuracy of this probability was studied. Melted TNT is a highly viscous fluid, so in this study by improving the numerical code, the effects of the temperature‐dependent physical properties have been seen in the calculations. The results show that the viscosity work makes the bubble heated and rises, its temperature in comparison with the fluid environment. But the variations are a maximum of 4 °K. Therefore, it seems that the studied factors in this paper can′t be the reason for melted TNT undesirable ignition. [ABSTRACT FROM AUTHOR]