The positive effect of plasma discharges on ignition and flame stability motivates the development of detailed kinetic mechanisms for high-fidelity simulations of plasma-assisted combustion. Because of their hierarchical nature, combustion processes require a large number of chemical species and pathways to describe hydrocarbon oxidation. In order to simulate kinetic enhancement by non-thermal electrons, additional species and processes are included, which model the ionization and excitation of neutral molecules. From a practical perspective, integrating large kinetics mechanisms is computationally burdensome due to the temporal stiffness of the nonlinear combustion dynamics and the memory requirements associated with the high number of species. In order to alleviate computational costs, a dimensionality reduction approach is proposed based on principal component analysis. The methodology is demonstrated on a detailed kinetics mechanism for plasma-assisted combustion excited by ...

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通过主成分分析开发等离子体辅助燃烧的骨架动力学机制

等离子体放电对点火和火焰稳定性的积极影响促使了详细的动力学机制的发展，这些动力学机制用于等离子体辅助燃烧的高保真模拟。由于其分级性质，燃烧过程需要大量的化学物质和途径来描述碳氢化合物的氧化。为了模拟非热电子的动力学增强作用，还包括其他种类和过程，它们模拟了中性分子的电离和激发。从实际的角度来看，由于非线性燃烧动力学的时间刚度以及与大量物质相关的存储要求，因此集成大型动力学机制在计算上是繁重的。为了减轻计算成本，提出了一种基于主成分分析的降维方法。该方法论在通过等离子体激发的等离子体辅助燃烧的详细动力学机理上得到了证明。