The Confinement Effect of Inert Materials on the Detonation of Insensitive High Explosives

• 作者: Ming Yu
• 来源期刊: 力学国际期刊(英文)
• 学科: 数学
• 关键词: DETONATION CONFINEMENT Effect Insensitive High Explosives Shock POLAR THEORY Cell-Centered LAGRANGIAN Method
• 年，卷（期）: 2018,（5）
• 页码范围: 161-181
• 页数: 21页
• 分类号: O1

摘要

The paper aims to theoretically and numerically investigate the confinement effect of inert materials on the detonation of insensitive high explosives. An improved shock polar theory based on the Zeldovich-von Neumann-Döring model of explosive detonation is established and can fully categorize the confinement interactions between insensitive high explosive and inert materials into six types for the inert materials with smaller sonic velocities than the Chapman-Jouguet velocity of explosive detonation. To confirm the theoretical categorization and obtain the flow details, a second-order, cell-centered Lagrangian hydrodynamic method based on the characteristic theory of the two-dimensional first-order hyperbolic partial differential equations with Ignition-Growth chemistry reaction law is proposed and can exactly numerically simulate the confinement interactions. The numerical result confirms the theoretical categorization and can further merge six types of interaction styles into five types for the inert materials with smaller sonic velocity, moreover, the numerical method can give a new type of interaction style existing a precursor wave in the confining inert material with a larger sonic velocity than the Chapman-Jouguet velocity of explosive detonation, in which a shock polar theory is invalid. The numerical method can also give the effect of inert materials on the edge angles of detonation wave front.