一种新爆轰产物状态方程及其在炸药爆轰性能预测上的应用  

A Novel Equation of State for Detonation Products and Its Application in Predicting the Detonation Performance of Explosives

作　　者：彭钺 张蕾[1] 谢明伟 麻宏亮[1] 袁晓霞 PENG Yue;ZHANG Lei;XIE Ming-wei;MA Hong-liang;YUAN Xiao-xia(Shaanxi Applied Physic‑Chemistry Research Institute,State Key Laboratory of Transient Chemical Effects and Control,Xi′an 710061,China)

机构地区：[1]陕西应用物理化学研究所瞬态化学效应与控制全国重点实验室,陕西西安710061

出　　处：《含能材料》2024年第9期942-951,共10页Chinese Journal of Energetic Materials

摘　　要：为准确描述爆轰产物在高温高压下的热力学关系,拓展应用范围,实现CHNO单质/混合炸药与含能金属盐爆轰性能的可靠预测,基于Exp⁃6势的维里系数理论值建立了新气态爆轰产物状态方程Virial⁃Peng⁃Long(VPL),并基于更准确的“冷压”项与考虑金属高压热运动变化的“晶格振动”项建立了新凝聚态金属产物三项式状态方程Wu⁃Chen⁃Peng(WCP)。应用VPL计算了几种典型CHNO单质/混合炸药的爆轰参数,应用VPL与WCP评价了几种典型含能金属盐的爆轰CJ参数与驱动做功能力。结果表明,相比VLW和BKW,基于VPL能够更准确评价CHNO单质/混合炸药的爆轰性能,对太安(PETN)爆速预测偏差在±2.1%以内,最高不超过2.5%;对RHT⁃901驱动圆筒稳定速度预测误差绝对值<1%。而VPL与WCP能够准确预测含能金属盐爆轰性能,其中对叠氮化铅爆轰CJ参数计算相对误差不超过±4%;对铜叠氮化物驱动飞片速度预测相对误差绝对值小于1%。For accurately describe the thermodynamic relationship of detonation products under high temperature and pressure,so as to achieve reliable prediction of the detonation performance of CHNO elemental/mixed explosives and energetic metal salts.In this work,a new equation of state(EOS):Virial⁃Peng⁃Long(VPL)for gaseous detonation products,was established based on the theoretical calculation of the 2-5th order virial coefficients of Exp⁃6 potential within a wide dimensionless tempera⁃ture range.At the same time,a new EOS for condensed metal products:Wu⁃Chen⁃Peng(WCP)EOS,was established by intro⁃ducing a more accurate“cold pressing”term,and a“lattice vibration”term which considered the changes in the thermal motion of metals under high pressure.Then,the VPL EOS was applied to calculate the detonation parameters of some typical CHNO ele⁃mental/mixed explosives,and the detonation CJ parameters and driving capacity of some typical energetic metal salts were evalu⁃ated using VPL and WCP.By comparing with experimental values,it is shown that the prediction deviation of detonation veloci⁃ty of pentaerythritol tetranitrate(PETN)is within±2.1%,with a maximum of about 2.5%;The absolute prediction error of the stable speed of copper cylinder driven by RHT⁃901 is less than 1%.VPL EOS and WCP EOS in this work can accurately evaluate the detonation performance of energetic metal salts.The relative error of detonation CJ parameters calculation for lead azide is within±4%,and the absolute value of relative error in predicting the speed of copper azide driven flyer is within 1%.

关 键 词：爆炸化学 爆轰产物状态方程 含能金属盐 爆轰性能 维里系数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]