NO and CO formation in an industrial gas-turbine combustion chamber using LES with the Eulerian sub-grid PDF method
NO and CO formation in an industrial gas-turbine combustion chamber using LES with the Eulerian sub-grid PDF method
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DOI：
10.1016/j.combustflame.2013.12.028
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发表时间：
2014-07-01
影响因子：
4.4
通讯作者：
Marquis, A. J.
中科院分区：
文献类型：
--
作者：
Bulat, G.;Jones, W. P.;Marquis, A. J.
计算能力和数值格式的进步使大涡模拟(LES)可以使用更详细的湍流燃烧模型，也可以应用于实际的燃气轮机燃烧室。在这项工作中，我们研究了工业燃气轮机燃烧室的排放形成，使用大涡模拟结合欧拉随机亚网格pdf模型。亚格子应力由Smagorinsky模型的动态版本表示，亚格子物种波动由8个随机场表征。该化学过程由15个反应步骤和19个物种组成的还原GRI3.0反应机理描述。所有的计算都是使用一个详细的块结构网格进行的，该网格捕捉了西门子SGT-100燃烧器在3巴压力下运行的所有几何特征。研究了辐射热损失的影响，并讨论了替代的四步化学机理的影响。计算结果与实验数据吻合较好。NO生成速率被量化，瞬时NO主导热生成途径和N2O生成途径。(C)2014年，燃烧研究所。爱思唯尔公司出版，版权所有。
The advances in computing power and numerical schemes allow Large Eddy Simulation (LES) to use more detailed turbulent combustion models as well as to be applied to real gas turbine combustors. In this work, we investigate the emissions formation in an industrial gas-turbine combustion chamber using LES with an Eulerian stochastic sub-grid pdf model with reduced chemistry. Sub-grid stresses are represented by a dynamic version of the Smagorinsky model and sub-grid species fluctuations are characterised by eight stochastic fields. The chemistry was represented by an ARM reduced GRI 3.0 mechanism with 15 reaction steps and 19 species. All calculations were carried out using a detailed block-structured mesh capturing all geometrical features of the Siemens SGT-100 burner operating at a pressure of 3 bar. The influence of the radiation heat losses was investigated and the impact of an alternative 4-step chemical mechanism was discussed. The results show good agreement with the experimental data. The NO formation rates were quantified with prompt NO dominating the thermal and N2O formation paths. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.