2D Combustion Model and Numerical Simulation of Mg-Teflon Pyrolant Based on Flow-chemistry Coupling

doi:10.3969/j.issn.1000-1093.2016.02.014

Abstract

Abstract: A two-dimensional computational fluid dynamics(CFD) model for flow-chemistry coupling is established to analyze the influence of turbulence on the combustion of Mg-teflon (MT) pyrolant. The steady combustion of MT pyrolants with different mixing ratios was simulated, and the combustion temperature and composition distribution characteristics were obtained. The calculated results are compared with the values in Refs.\[10,16,18\]. The compared results show that the rising step of temperature in the combustion field is about 20mm, which agrees well with the experimental data in Ref.\[10\]. The distance of temperature rising step is corresponding to the reaction region of C₂F₄+M2CF₂+M. The highest temperature of MT pyrolant with equivalent mixing ratio (33/67) is consistent with the thermodynamic calculated result. With the increase in mixing ratio, the incomplete reaction happens. Mg is mainly consumed through its oxidizing reaction with CF₂. The reaction of Mg with F cannot be neglected. The percentage of combustion product MgF reduces with the increase in mixing ratio.

Key words: ordnance science and technology, Mg-Teflon pyrolant, turbulence combustion, coupling, numerical simulation

CLC Number:

TJ530.2

LIN Chang-jin， WANG Hao， ZHU Chen-guang. 2D Combustion Model and Numerical Simulation of Mg-Teflon Pyrolant Based on Flow-chemistry Coupling[J]. Acta Armamentarii, 2016, 37(2): 287-292.

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