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Optimized Skeletal Models of Butane Combustion

机译:优化的丁烷燃烧骨骼模型

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Skeletal reaction models for n-butane and iso-butane combustion are derived from the detailed gas phase chemistry model of USC Mech II through directed relation graph (DRG) and DRG aided sensitivity analysis (DRGASA) methods. The skeletal models generated from various combustion systems, e.g. auto-ignitions versus premixed flames, n-butane versus i-butane, are compared, and analyzed based on the temperature and species profiles during ignition and within the flames. The reduced models are further optimized through the method of uncertainty minimization by polynomial chaos expansion (MUM-PCE) to enhance model performances. The uncertainty of the optimized model is quantified by the spectral expansion technique, exploring the relationship between the model size and uncertainty.
机译:通过指导关系图(DRG)和DRG辅助敏感性分析(DRGASA)方法,从USC机制的详细气相化学模型衍生出正丁烷和异丁烷燃烧的骨架反应模型。从各种燃烧系统产生的骨架模型,例如,比较自动点火与预混火焰,N-丁烷与I-Butane进行比较,并根据点火过程中的温度和物种曲线和火焰内进行分析。通过多项式混沌膨胀(MUM-PCE)来进一步优化减少模型,以提高模型性能的不确定度最小化。通过光谱扩展技术量化优化模型的不确定性,探讨了模型大小与不确定性之间的关系。

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