Analysis of thermal response characteristics of 2,4 dinitroanisole melt cast explosive

DOI:	10.11809/bqzbgcxb2023.08.003
Keywords:	2,4 dinitroanisole; solubility; apparent viscosity; multi step chemical reaction; heat transfer
Abstract:	In order to investigate thermal response characteristics of DNAN based melt cast explosive, this paper designs slow cook off experiments at a heating rate of 1 ℃/min, and tests the internal temperature and response of three sizes of roast specimens. The results show that, with the increase of the size, the response temperatures of the explosive decrease gradually, which are 196.7 ℃, 184.6 ℃ and 180.9 ℃ respectively. The reaction after the response is the combustion. In order to scientifically analyze the influence of the flow of a suspended system on the roasting mechanism, a multi component hybrid grid calculation method is coupled with the RDX solubility, explosive apparent viscosity and multi step reaction kinetics. The error between the calculation and the experimental results is less than 5%. The analysis of the temperature field shows that the explosive forms a high temperature zone at the upper end, and the flow trend changes with the formation of the high temperature zone. Near the ignition time, the high temperature zone gradually diffuses and moves to the center. The ignition positions of 19 mm×19 mm and 19 mm×38 mm are the center. For size 19 mm×76 mm, the ignition is asymmetric at upper and lower ends.
Issue:	Vol. 44 No. 8 (2023)
Published:	2023-08-28
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