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摘要: 以压装TNT为例,开展二维拉氏实验,利用二维锰铜-康铜组合拉氏量计测量了轴对称位置和径 向位置的压力时程曲线和径向位移曲线。同时利用二维拉格朗日分析计算程序RFLA 对压装TNT 的冲击 波起爆过程进行了计算,分别得到了在2个不同径向位置上各个Lagrange位置上的质点速度、相对比容、比 内能等时程曲线。研究结果展现了侧向稀疏波对非均质炸药冲击起爆过程中各个流场物理量的影响。Abstract: PressedTNTexplosivewaschosentocarryout2-D Lagrangianexperiments.Therelied two2-Dcompositemanganin-constantan(CMC)LagrangiangaugesatthesameLagrangianposition. Andthetwogaugeswereplacedonandofftheaxis,respectively.ThepressureandradialdisplacementweremeasuredbytheCMCLagrangiangaugesembeddedbetweenindividualdiscsofexplosives. AndtheshockinitiationprocessofthepressedTNTwasanalyzedbyusingthe2-DreactiveflowLagrangiananalysis. AtthedifferentLagrangianpositions,somevariablesweregained,suchasparticle velocity,relativespecificvolume,specificinternalenergy,reactionrateandfrozensoundspeed.Resultsrevealtheeffectsoflateralrarefactionwavesonexplosivevariablesduringshockinitiation.
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Key words:
- mechanicsofexplosion /
- shockinitiation /
- Lagrangiananalysis /
- explosives
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