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首页> 外文会议>IUTAM Symposium on Turbulent Mixing and Combustion, Jun 3-6, 2001, Kingston, Ontario, Canada >ONE-DIMENSIONAL STOCHASTIC SIMULATION OF ADVECTION-DIFFUSION-REACTION COUPLINGS IN TURBULENT COMBUSTION
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ONE-DIMENSIONAL STOCHASTIC SIMULATION OF ADVECTION-DIFFUSION-REACTION COUPLINGS IN TURBULENT COMBUSTION

机译：湍流燃烧中扩散-反应耦合的一维随机模拟

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摘要

The study of turbulent reacting flows invariably involves simplifying assumptions. Here an alternative modeling strategy is adopted that explicitly represents certain nonlinear couplings among the various sub-processes governing turbulent combustion, including unsteadiness and multi-scale interactions. This strategy involves fully resolved simulation at moderately large Reynolds numbers, which is rendered affordable for fully turbulent regimes by formulating a one-dimensional stochastic representation of turbulent flow evolution. The modeling challenges that arise, and the present approach to addressing these challenges, are illustrated by applying the new methodology, denoted one-dimensional turbulence (ODT), to nonpremixed jet flames that exhibit varying degrees of localized extinction and reignition. The role of unsteady strain and molecular transport in ODT in representing extinction and reignition processes in a turbulent environment is noted.
机译：湍流反应流的研究总是涉及简化假设。在这里，采用了一种替代建模策略，该策略明确表示了控制湍流燃烧的各个子过程之间的某些非线性耦合，包括不稳定和多尺度相互作用。此策略涉及在中等大的雷诺数下完全解析的模拟，通过制定湍流演化的一维随机表示形式，使完全湍流状态可负担得起。通过将表示为一维湍流（ODT）的新方法应用于表现出不同程度的局部消光和着火的非预混喷射火焰，可以说明出现的建模挑战以及解决这些挑战的当前方法。指出了ODT中不稳定的应变和分子运输在代表湍流环境中的灭绝和重燃过程中的作用。

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