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摘要: 为了研究温压炸药后燃反应及其对空中爆炸冲击波的影响规律,采用实验和数值模拟相结合的方 法对温压炸药能量输出结构进行了初步研究。结果表明,距爆心较近时冲击波压力时程曲线上呈现两个峰 值,而在较远处则存在较宽的正压作用区,该炸药正压作用区冲量为相同质量TNT的约1.6~1.8倍。并根 据JWL-Miller模型参数得出后燃反应释放的能量占总能量的约1/3,以及非理想组分反应度随时间的变化 关系,在完全燃烧的理想情况下,后燃持续时间可达400ms。说明温压炸药中铝粉等高能添加剂的后燃反应 对增强冲击波效应和提高炸药做功能力有显著贡献。Abstract: Toexploretheinfluenceoftheafter-burningonthestrengthoftheshockwavesproducedby thethermobaricexplosiveexplosioninair,experimentsandnumericalsimulationswereperformedto investigatetheenergyoutputstructure.Theresultsshowthattherelietwopeaksonthepressuretimecurvesinthenearfieldandalongpositivepressureperiodinthefarfield. Theimpulseofthe thermobaricexplosiveinthepositivepressureperiodis1.6~1.8timesasmuchasthatoftheTNT explosivewiththesamemass.TheanalysisoftheJWL-Millermodelparametersrevealsthattheenergyreleasedbytheafter- burningreactionoccupiesaboutone-thirdsofthetotalenergy.Furthermore, thereactiondegreeevolutioncurvewasobtainedforthenonidealcomponent.Inthecaseof completeburning,theafter-burningreactioncanlast400ms.Itindicatesthattheafter-burningof highenergyadditivescanevidentlyenhancethepowerofthermobaricexplosive.
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Key words:
- mechanicsofexplosio /
- energyoutput /
- thermobaricexplosive /
- after-burningeffect
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