摘要
数值模拟了爆炸驱动管中柱状装药内爆轰波的传播过程。计算采用欧拉型有限体积方法,炸药及爆轰产物均采用JWL状态方程,空气采用理想气体状态方程,采用"点火-生长"模型计算化学反应速率。计算得到了驱动管内波系结构的发展过程,爆速与经验公式符合得较好。计算表明,驱动管侧壁的压力峰值在800MPa以上,而在管底中心处,由于激波的汇聚,压力峰值高达12.4GPa。
The evolution of detonation waves in cylindrical explosives in driving tube is simulated in this paper. Eulerian finite volume method is used, in which the JWL（Jone-Wilkins-Lee） state equation is used for both explosives and detonation products, while the prefect gas state equation for air, and the ignition and growth model is used to calculate chemical reaction rates. The evolution of wave structures is obtained, which can calculate detonation speed accords well with experiential formula. It is also demonstrated that the peak pressure on the side inboard of the tube is above 100MPa, and due to the converge of shock waves, the peak pressure in the center of bottom is as high as 12.4GPa.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2009年第5期106-111,共6页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(90505003
10602064)
国防科技大学优秀研究生创新资助项目
关键词
爆炸力学
凝聚态炸药
爆轰
点火-生长模型
explosion mechanics
condensed explosive
detonation
ignition and growth model
