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摘要: 基于带化学反应的二维Euler方程,采用氢气/空气的9组分19步基元反应简化模型,对充有当量 比的氢气/空气预混气体的矩形爆轰流场中爆轰波的传播过程进行了数值模拟,讨论了均匀来流对爆轰波传 播的影响。数值结果表明,在均匀来流的影响下,上游方向上的燃烧强度大于C-J爆速,下游方向上的燃烧强 度小于C-J爆速;上游方向传播的爆轰波的阵面压力大于下游方向传播的爆轰波的阵面压力。所以,经典的 C-J爆轰理论并不适用于流动系统中爆轰波传播特性的研究。Abstract: Therectangulardetonationflowfieldfilledwithhydrogen-airissimulatednumericallybased onmulticomponenttwo-dimensionalEulerequation,andeffectsofuniformincomingflowondetonationwavepropagationwerediscussed. Fromthenumericalresults,dependingontheflowvelocity, theapparentpropagationvelocityofadetonationwaveishigherintheupstreamdirectionandlowerin thedownstreamdirectionthanvC-J.Thepressureoftheupstream movingdetonationishigherthan thatofthedownstream movingdetonation.Asaresult,investigationofdetonationwavepropagation inaflowsystembyclassicalC-Jdetonationtheoryisunsuitable.
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Key words:
- mechanicsofexplosion /
- detonationwave /
- C-Jdetonationtheory /
- flowsystem
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