CAJ | 학술논문

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.
수치모의료폭작구동관중주상장약내폭굉파적전파과정.계산채용구랍형유한체적방법,작약급폭굉산물균채용JWL상태방정,공기채용이상기체상태방정,채용"점화-생장"모형계산화학반응속솔.계산득도료구동관내파계결구적발전과정,폭속여경험공식부합득교호.계산표명,구동관측벽적압력봉치재800MPa이상,이재관저중심처,유우격파적회취,압력봉치고체12.4GPa.
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(Jones-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 800MPa, and due to the converge of shock waves, the peak pressure in the center of bottom is as high as 12.4GPa.