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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Method of moments comparison for soot population modeling in turbulent combustion
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Method of moments comparison for soot population modeling in turbulent combustion

机译：APS-流体动力学APS分部第70届年会-事件-湍流燃烧中烟尘种群建模的矩比较方法

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摘要

Representation of soot population is an important component in the efficient computational prediction of particulate emissions. However, there are a number of moments-based techniques with varying numerical complexity. In the past, development of such methods has been principally carried out on canonical laminar and 0-D flows. However, their applications in realistic solvers developed for turbulent combustion may face challenges from turbulence closure to selection of moment sets. In this work, the accuracy and relative computational expense of a few common soot method of moments are tested in canonical turbulent flames for different configurations. Large eddy simulation (LES) will be used as the turbulence modeling framework. In grid-filtered LES, the interaction of numerical and modeling errors is a first-order problem that can undermine the accuracy of soot predictions. In the past, special moments-based methods for solvers that transport high frequency content fluid with ability to reconstruct particle size distribution have been developed. Here, a similar analysis will be carried out for the moment-based soot modeling approaches above. Specifically, realizability of moments methods with nonlinear advection schemes will be discussed.
机译：烟尘数量的表示是有效计算颗粒物排放量的重要组成部分。但是，有许多基于矩的技术具有不同的数值复杂性。过去，此类方法的开发主要在规范层流和0-D流上进行。但是，它们在为湍流燃烧开发的逼真的求解器中的应用可能会面临从湍流闭合到矩集选择的挑战。在这项工作中，在规范的湍流火焰中，针对不同的配置，测试了几种常见的矩烟尘方法的准确性和相对计算费用。大涡模拟（LES）将用作湍流建模框架。在网格滤波的LES中，数值误差和建模误差的相互作用是一阶问题，可能会破坏烟尘预测的准确性。过去，已经开发出了基于特殊矩的求解器方法，该方法可以传输具有重构粒度分布能力的高频含量流体。在这里，将对以上基于矩的烟灰建模方法进行类似的分析。具体来说，将讨论具有非线性对流方案的矩量法的可实现性。

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