A new reaction rate model for simulating the detonation process of the insensitive high explosives
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摘要: 根据钝感炸药爆轰过程中含有激化过程和慢反应，建立了一种新的反应率模型。与其他反应率模型相比，这种反应率模型可以应用于较粗的网格。在每厘米50个网格条件下，炸药驱动铝飞片和钽飞片的自由面计算结果与实验结果很接近。同时，应用此反应率模型计算了钝感炸药驱动LiF过程，在每厘米50个网格的条件下，炸药与LiF间速度的计算值同实验值接近，且误差随网格尺寸变小而变小。这些表明，此反应率模型能够在较粗的网格条件下，比较准确地描述钝感炸药驱动飞片过程，有利于在工程实际中应用。Abstract: A new reaction model was proposed by thinking of the excitation process and slow reaction in the detonation process of insensitive high explosives (IHE). This reaction model can be used in coarse mesh as compared with other reaction model. In the mesh of 50 cells per centimeter, the calculated results of the free velocity of tantalum and aluminum flyers driven by IHE are according with the experiment data. This model was applied to calculate the process of IHE driving LiF. In the mesh of 50 cells pre centimeter. The calculated result of the interface between LiF and IHE is according with the experimental data. When the mesh size is smaller, the error between them is smaller. It indicates that this new model can describe the process of driven flyers by IHE in coarse mesh, and it can be used in practical works.
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Key words:
- mechanics of explosion /
- reaction rate /
- coarse mesh /
- insensitive high explosives
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