Numericalinvestigationonflowfieldcharacteristicsoftoroidalshockwaves focusinginacylindricaltube
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摘要: 针对环形激波聚焦过程产生的高温、高压特性,采用间断有限元方法模拟了环形激波在同轴圆柱 形激波管内的聚焦流场特性。计算结果表明,采用间断有限元方法能够有效地捕捉激波聚焦过程形成的二次 激波、涡环、三波交点和球面双马赫反射等主要流动特征。此外,通过改变环形管道内外半径对聚焦流场进行 模拟发现,环形管道外径对中心轴线上聚焦峰值压力的大小和位置影响较小,环形管道内径对中心轴线上聚 焦峰值压力的大小和位置影响较大。计算结果可以为工程应用提供一定的理论指导。Abstract: Aimedathightemperatureandhighpressurecharacteristicsgeneratedfromtoroidalshock wavefocusing,adiscontinuousfiniteelementmethodwasusedtonumericallysimulatetoroidalshock wavefocusinginaco-axiscylindricaltube.Thesimulatedresultsindicatethatthediscontinuousfinite elementmethodcancaptureefficientlythecomplicatedflow-fieldwavestructureswhichincludesecondaryshock wave,vortexring,triplepointandsphericaldouble Machreflectionformedduring shockwavespropagatingintheco-axialcylindricalshocktube.Andfromthesimulatedresults,itcan befoundthattheinnerradiusofthetoroidalpipelinecanaffectmarkedlythevalueandlocationofthe peakpressurealongtheaxisline,andtheouterradiusofthetoroidalpipelineplaysaweakrole.The investigatedresultscanprovideatheoreticalguideforengineeringapplication.
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Key words:
- fluidmechanics /
- focusing /
- discontinuousfiniteelementmethod /
- toroidalshockwaves
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1. 张玉磊,李芝绒,张俊锋,潘文,王胜强. TNT坑道内爆炸热作用规律的试验研究. 火炸药学报. 2019(05): 526-530 . 百度学术
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