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摘要: 在自主研发的二维多介质欧拉弹塑性流体力学程序中,通过引入点火增长的反应率模型以及炸药 减敏模型,借助网格自适应技术,研究钝感炸药的冲击点火、直径效应以及死区形成等爆轰现象。数值模拟结 果表明,该程序能够正确模拟平面爆轰波的爆速、CJ状态、vonNeumann尖点等爆轰参数;并能够较好模拟炸 药的直径效应。另外,通过引入考虑减敏效应的反应率模型,能较好地模拟钝感炸药的死区形成过程。Abstract: Theignition-growthreactivemodelandadesensitizingmodelwereintroducedintotheselfdevelopedtwo- dimensionalmulticomponentEulerianelastic-plastichydrodynamicscode(MEPH2Y), respectively.Numericalstudieswerecarriedoutonsomedetonativephenomenaincludingtheshock ignition,thediametereffectandtheformationofthedeadzone,withtheaidoftheadaptivemeshrefinementtechnique. Thenumericalresultsshowthatthecomputationcansimulatethemajorcharacteristicsoftheplanardetonationwaves, suchasthedetonationwavespeed,CJstate,vonNeumann spikestateandsoon.Andthediametereffectsoftheexplosivescanbesimulatedcorrectly.Under theconsiderationofthedesensitizingreactivemodel,thedeadzoneformationoftheinsensitivehigh explosivescanalsobereproduced.
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