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The turbulent flame speed for low-to-moderate turbulence intensities: Hydrodynamic theory vs. experiments

机译：中低湍流强度的湍流火焰速度：流体力学理论与实验

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This paper, dedicated to Norbert Peters, follows his lead in developing theoretical understanding of the complex flow-turbulence interactions occurring in the propagation of premixed flames. The work is based on the asymptotic hydrodynamic model of premixed flames, where the flame is modeled by a surface that separates unburned and burned gases and propagates relative to the incoming flow at a speed that depends locally on the flame stretch rate. As such the work may be categorized as corresponding to the "flamelet regime", based on the turbulent combustion regimes diagram. The results at the present are limited to mixtures corresponding to positive Markstein lengths, and to "two-dimensional turbulent flows". In this parametric study, the different factors affecting the turbulent flame speed have been examined and scaling laws for the turbulent flame speed are proposed for low-to-moderate turbulence intensities that highlight the dependence on physically measurable quantities. Comparison to various empirical correlations suggested in the literature is presented. The results, devoid of turbulence-modeling assumptions and/or ad-hoc coefficients, can help explaining the influence of varying the system parameters individually and collectively, and formulating physically-based small-scale models for large-scale numerical simulations of turbulent flames. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：这篇致力于诺伯特·彼得斯的论文跟随他的领导，发展了对预混火焰传播中发生的复杂的湍流相互作用的理论理解。这项工作基于预混合火焰的渐近流体力学模型，其中火焰通过一个表面建模，该表面将未燃烧和已燃烧的气体分开，并相对于传入流以局部取决于火焰拉伸速率的速度传播。因此，可以基于湍流燃烧状态图将工作分类为与“小火焰状态”相对应。目前的结果仅限于与正马克斯坦长度相对应的混合物，以及“二维湍流”。在此参数研究中，已研究了影响湍流火焰速度的不同因素，并针对低到中等的湍流强度提出了湍流火焰速度的缩放定律，突出了对物理可测量量的依赖性。与文献中提出的各种经验相关性进行了比较。结果没有湍流建模假设和/或临时系数，可以帮助解释单独和集体更改系统参数的影响，并为湍流火焰的大规模数值模拟建立基于物理的小规模模型。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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