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摘要: 针对30楔角的驻定斜爆轰特性,选择在临界爆轰马赫数附近6.8、7.0与7.5等3种不同马赫数 来流状态进行数值分析。在马赫数为6.8、7.0状态下,在斜激波(obliqueshockwave,OSW)、斜爆轰波(obliquedetonationwave, ODW)与爆燃波交汇处形成的三波点后形成一道激波,在楔面上反射,并透过接触间 断面与爆轰波阵面产生的横波相互作用,使得下游流场发生扰动,形成不规则的胞格结构。斜爆轰波阵面产 生的横波呈现上游单向传播与下游双向传播同时并存的现象,对斜爆轰的稳定性产生了影响。Abstract: Numericalsimulationswerecarriedouttoinvestigatethecharacteristicsofstandingoblique detonationwave(ODW)fordifferentMach6.8,7.0and7.5inletflowsoverawedgeof30turning angle.NumericalresultsshowashockwaveatMach6.8and7.0appearsatthedownstreamofthe triplepointwhichisformedamongobliqueshockwave(OSW),ODWanddeflagrationwave,reflects fromthewedgewall,passesacrossthecontactsurfaceandinteractswithtransversewaveswhichoriginatingfromtheODWfront. Thisinteractionmakescellularstructureirregularandcomplex.At thesametime,anewfeatureshowsthetransversewavespropagatebothinone-waydirectionupstreamandintwo- waydirectiondownstreambehindtheODW.Thepropagationcharacteristicaffects thestabilityofobliquedetonationwave.
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Key words:
- mechanicsofexplosion /
- cellularstructure /
- contactsurface /
- obliquedetonation wave /
- transversewave
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