摘要
多介质数值计算中对于高压比和高密度比的介质界面间的处理一直以来是个难点,而且目前的计算精度都不高。本工作采用位标函数捕捉物质界面,用修正的虚拟流体方法对界面进行了处理,其中含能材料爆轰产物JWL状态方程系数通过Kihara-Hikita-Tanaka(KHT)计算的等熵膨胀数据拟合得到,并实现了程序化。对TNT和PETN两种高能炸药在水中爆炸的能量输出特性进行了计算,结果表明,本工作的计算结果与实验相似律计算结果比较吻合,误差在10%以内。
The interface of the multi-medium fluid was caught with Level-Set and the interface was dealt with modified Ghost Fluid Method. The coefficients of JWL about detonations were obtained from isentropie expansion data calculated by Kihara-Hikita-Tanaka （KHT） and were programmed. The energy output of underwater explosion for TNT and PETN was calculated. Results show that energy output calculated by the program is consistent with that calculated by explosion similar rules, and the error is less than 10%.
出处
《含能材料》
EI
CAS
CSCD
2008年第2期171-174,共4页
Chinese Journal of Energetic Materials
基金
国家"973"研究项目(65140010102)
关键词
爆炸力学
水下爆炸
相似律
虚拟流体方法
explosion mechanics
underwater-explosion
similar-rule
ghost fluid method （ GFM ）
