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首页> 外文期刊>The European physical journal, E. Soft matter >Nonequilibrium processes in meta-stable media
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Nonequilibrium processes in meta-stable media

机译：Meta稳定媒体中的非预测过程

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Meta-stable systems are those staying in the local equilibrium state: being slightly deviated from it they return to the equilibrium, but in case deviation surpasses a critical value those systems fall down to another equilibrium state. Chemically reacting gaseous mixture provides a typical example of a meta-stable system. The paper is aimed at numerical and experimental investigation of detonation initiation in hydrogen-air mixtures due to focusing of a shock wave reflected inside a wedge. Both numerical and experimental investigations were conducted. Comparison of numerical and experimental results made it possible to validate the developed 3D transient mathematical model of chemically reacting gas mixture flows incorporating hydrogen-air mixtures. Kinetic schemes and turbulence models were improved based on comparison of numerical and experimental results. Several different flow scenarios manifest in the reflection of shock waves all being dependent on the incident shock wave intensity: reflection of the shock wave with lagging behind the combustion zone, formation of a detonation wave in reflection and focusing, and intermediate transient regimes.
机译：元稳定的系统是留在局部均衡状态的那些：稍微偏离它，它们返回平衡，但是，如果偏差超过临界值，那么这些系统均落到另一个均衡状态。化学反应气体混合物提供了元稳定系统的典型实例。本文旨在旨在对氢气混合物中的爆轰起始引起的数值和实验研究，由于楔形内反射的冲击波。进行了数值和实验研究。数值和实验结果的比较使得可以验证结合氢气混合物的化学反应气体混合物流动的显影3D瞬态数学模型。基于数值和实验结果的比较，改善了动力学方案和湍流模型。几种不同的流程情景在冲击波的反射中呈现，依赖于入射冲击波强度：反射燃烧区后面的冲击波的反射，在反射和聚焦中形成爆炸波，中间瞬态制度。

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