On the concept of the critical size of a detonation kernel
On the concept of the critical size of a detonation kernel
复制标题
爆轰核临界尺寸的概念
DOI：
10.1016/0010-2180(76)90038-9
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发表时间：
1976
影响因子：
4.4
通讯作者：
K. Ramamurthi
中科院分区：
文献类型：
--
作者：
John H. S. Lee;K. Ramamurthi
类比点火理论中火焰核的概念，引入爆轰核的概念。爆轰核的临界尺寸由起爆源产生的冲击波所包围的源能量密度和气体的化学能量密度之间的平衡条件确定。研究发现，爆轰核的临界尺寸对引发源的具体特征不敏感，因此取决于混合物本身的化学性质。临界爆震核尺寸可用于获得直接起爆的临界能量和多头爆震的横波间距。与实验数据的一致性非常好。本文通过爆轰核的概念提供了一种将爆轰波特征与爆炸性混合物的化学性质联系起来的定量理论。
This paper introduces the concept of the detonation kernel in analogy to the concept of the flame kernel in ignition theory. The critical size of a detonation kernel is specified by the balance condition between the source energy density and the chemical energy density of the gas enclosed by the shock wave generated by the initiation source. It is found that the critical size of the detonation kernel is insensitive to the particular characteristics of the initiation source and thus depends on the chemical properties of the mixture itself. The critical detonation kernel size can be used to obtain the critical energy for direct initiation and the transverse wave spacing of a multiheaded detonation. The agreement with experimental data is excellent. The present paper provides a quantitative theory linking the characteristics of a detonation wave to the chemical properties of the explosive mixture via the concept of the detonation kernel.