Sub-grid scale combustion models for large eddy simulation of unsteady premixed flame propagation around obstacles
Sub-grid scale combustion models for large eddy simulation of unsteady premixed flame propagation around obstacles
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DOI：
10.1016/j.jhazmat.2010.03.006
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发表时间：
2010-08-15
影响因子：
13.6
通讯作者：
Russo, Gennaro
中科院分区：
文献类型：
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作者：
Di Sarli, Valeria;Di Benedetto, Almerinda;Russo, Gennaro
在这项工作中，对稳态湍流预混燃烧的大涡模拟 (LES) 提出的不同亚网格尺度 (SGS) 燃烧模型进行了评估（Colin 等人，Phys. Fluids 12(2000) 1843-1863：Flohr 和 Pitsch，Proc. CTR Summer Program，2000，第 61-82 页；Kim 和 Menon，Combust. Sci.技术160(2000) 119-150：Charlette 等人，《燃烧》。 Flame 131(2002) 159-180：Pitsch 和 Duchamp de Lageneste，Proc。燃烧。研究所。 29 (2002) 2001-2008) 的执行是为了确定最能预测气体爆炸中不稳定火焰传播的模型。将数值结果与 Patel 等人的实验数据进行了比较。 (Proc. Combust. Inst. 29 (2002) 1849-1854) 用于在存在三个连续障碍物的通风室中预混合爆燃火焰。结果发现，所有 sgs 燃烧模型都能够在每个障碍物周围的火焰加速和减速步长以及传播火焰的形状方面定性地再现实验。在不调整任何常数和参数的情况下，Charlette 等人的 sgs 模型。还提供了令人满意的火焰速度和压力峰值的定量预测。相反，Charlette 等人以外的 sgs 燃烧模型。仅在对常数和参数进行临时调整后才能给出正确的预测。 (C) 2010 Elsevier B.V. 保留所有权利。
In this work, an assessment of different sub-grid scale (sgs) combustion models proposed for large eddy simulation (LES) of steady turbulent premixed combustion (Colin et al., Phys. Fluids 12(2000) 1843-1863: Flohr and Pitsch, Proc. CTR Summer Program, 2000, pp. 61-82; Kim and Menon, Combust. Sci. Technol. 160(2000) 119-150: Charlette et al., Combust. Flame 131(2002) 159-180: Pitsch and Duchamp de Lageneste, Proc. Combust. Inst. 29 (2002) 2001-2008) was performed to identify the model that best predicts unsteady flame propagation in gas explosions. Numerical results were compared to the experimental data by Patel et al. (Proc. Combust. Inst. 29 (2002) 1849-1854) for premixed deflagrating flame in a vented chamber in the presence of three sequential obstacles. It is found that all sgs combustion models are able to reproduce qualitatively the experiment in terms of step of flame acceleration and deceleration around each obstacle, and shape of the propagating flame. Without adjusting any constants and parameters, the sgs model by Charlette et al. also provides satisfactory quantitative predictions for flame speed and pressure peak. Conversely, the sgs combustion models other than Charlette et al. give correct predictions only after an ad hoc tuning of constants and parameters. (C) 2010 Elsevier B.V. All rights reserved.