Modelling of a Premixed Swirl-stabilized Flame Using a Turbulent Flame Speed Closure Model in LES
Modelling of a Premixed Swirl-stabilized Flame Using a Turbulent Flame Speed Closure Model in LES
复制标题
使用 LES 中的湍流火焰速度闭合模型对预混旋流稳定火焰进行建模
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Bockhorn
中科院分区：
文献类型：
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作者：
Feichi Zhang;P. Habisreuther;M. Hettel;H. Bockhorn
提出了一种基于湍流火焰速度闭合（TFC）技术的燃烧模型，用于预混火焰的大涡模拟（LES）。该模型最初是为RANS（雷诺平均纳维斯托克斯方程）方法开发的，并在这里扩展到LES。在亚网格水平上得到了计算湍流火焰速度所需的湍流量。该模型首先通过一个试验案例进行了验证，然后应用于一个典型的具有旋流稳定火焰的工业燃烧室。结果表明，该模型易于应用，结果是有希望的。甚至可以捕获出现燃烧不稳定性的典型频率。但是，使用可压缩LES也可能导致非物理压力波，其起源于边界条件的数值处理。
This paper proposes a combustion model based on a turbulent flame speed closure (TFC) technique for large eddy simulation (LES) of premixed flames. The model was originally developed for the RANS (Reynolds Averaged Navier Stokes equations) approach and was extended here to LES. The turbulent quantities needed for calculation of the turbulent flame speed are obtained at the sub grid level. This model was at first experienced via an test case and then applied to a typical industrial combustor with a swirl stabilized flame. The paper shows that the model is easy to apply and that the results are promising. Even typical frequencies of arising combustion instabilities can be captured. But, the use of compressible LES may also lead to unphysical pressure waves which have their origin in the numerical treatment of the boundary conditions.