Modeling and Simulation of Laser‐Induced Ignition of RDX Using Detailed Chemical Kinetics
Modeling and Simulation of Laser‐Induced Ignition of RDX Using Detailed Chemical Kinetics
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DOI：
10.1002/prep.201400064
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
Z. Tian;Zhenyu Zhang;F. Lu;Rong Chen
中科院分区：
文献类型：
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作者：
Z. Tian;Zhenyu Zhang;F. Lu;Rong Chen
建立了黑索今激光点火模型，该模型采用包含45个组分、231个反应的详细化学动力学方案描述气相反应。该模型在空间上是一维的，包括两个区域的瞬时发展：凝聚相和气相。凝聚相由固体RDX、液体RDX和部分分解产物组成。主要的物理化学过程包括熔融、分解、蒸发和辐射吸收。气相由黑索金蒸气和反应产物组成，主要过程包括对流、扩散、热传导、化学反应和辐射吸收。在界面边界条件下，凝聚相的控制参数是能量守恒方程和物质浓度守恒方程，而气相的控制参数是质量守恒方程、动量守恒方程、能量守恒方程和物质浓度守恒方程。用FORTRAN编制了有限差分程序，并进行了数值模拟。从温度和组分浓度的分布和演化两个方面讨论了黑索今的着火过程。该模型能够合理地预测火焰在点火后立即向表面移动，然后离开表面的现象。
A laser-induced ignition model of RDX is developed, in which a detailed chemical kinetics scheme, containing 45 species and 231 reactions, is employed to describe the reaction in the gas phase. The model is spatially one-dimensional and includes the transient development of two regions: the condensed phase and the gas phase. The condensed phase is composed of solid RDX, liquid RDX, and some decomposition products. The main physicochemical processes include melting, decomposation, vaporization, and radiation absorption. The gas phase is composed of RDX vapor and reaction products and the main processes include convection, diffusion, heat conduction, chemical reaction, and radiation absorption. With interfacial boundary conditions, the governing parameters for the condensed phase are conservation equations of energy and species concentration, whereas those for the gas phase are the conservation equations of mass, momentum, energy, and species concentration. A finite difference program using FORTRAN is compiled and numerical simulation is carried out. The ignition process of RDX is discussed from the distribution and evolution of temperature and species concentration. The model can provide a reasonable prediction of the phenomenon that the flame moves towards the surface immediately after ignition, and then departed from the surface.