Sponsor(s): China Academy of Engineering Physics
12 issues per year
Current Issue: Issue 08, 2019
Chinese Journal of Energetic Materials aims to timely report domestic and foreign fire explosives, propellants, pyrotechnics, pyrotechnics, weapons and ammunition design, experimental and related materials development, process technology, performance testing, explosion technology and its application, energetic materials The latest achievements in inventory reliability, industrial wastewater treatment, environmental protection, etc., promote scientific and technological progress in the field of energetic materials.
Editor-in-Chief: Tian Yong
Chinese Journal of Energetic Materials,2019,Vol 27,No. 08
To study the influence rule of the after-burning effect on the parameters of the explosion field, a numerical calculation method for the explosion field in a closed space considering the after-burning effects was proposed. The simplified reaction rate model was coupled with three-dimensional two components compressible Euler equations to approximately consider the after-burning effect. The transient temperature was obtained by establishing the relationship between gas internal energy and heat capacity. The calculation formula of the adiabatic index was established according to thermodynamic relation. Based on the FORTRAN platform, the fifth-order WENO finite difference scheme was adopted to develop an closed 3D numerical calculation code, which can simulate the explosion field in closed space considering the after-burning effects. The evolution process of internal explosion field and the influence of the after-burning effect on the calculated explosion field parameters were numerically discussed based on the developed code. Results show that (1) the numerical solutions of quasi-static temperature, adiabatic index, and overpressure are in good agreement with theoretical solutions considering the after-burning effect, and the relative error is less than 5%. The reliability of the developed code is preliminarily verified; (2) the after-burning effect should be paid enough attention in numerical simulation of the internal explosion field. the numerical solutions of the quasi-static temperature, adiabatic index, and overpressure under the same explosion condition have large errors, up to 25%, 6%, and 31% respectively, compared with that of the theoretical solutions without considering the after-burning effect. This research method can be applied to the numerical calculation of internal explosion of other types of explosives and provide some reference and guidance for the evaluation of internal explosion damage