Modelling flame turbulence interaction in RANS simulation of premixed turbulent combustion

Modelling flame turbulence interaction in RANS simulation of premixed turbulent combustion
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预混湍流燃烧 RANS 模拟中火焰湍流相互作用的建模

DOI:
10.1080/13647830.2015.1115130
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发表时间:
2015
影响因子:
1.3
通讯作者:
Ahmed U
Ahmed U
中科院分区:
工程技术4区
文献类型:
--
作者:
Ahmed U

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火焰湍流相互作用是模拟预混湍流燃烧标量耗散的重要条件。为了得到火焰湍流相互作用现象的准确描述,最近提出了一个演化方程。这个方程提供了对火焰湍流相互作用现象的详细了解,并提供了一种替代方法来模拟由所代表的重要物理。本文利用演化方程对湍流混合层中稳定的丙烷-空气预混火焰进行了数值模拟。在雷诺平均N-S(RANS)框架下进行了数值模拟,并与实验结果和大涡模拟(LES)结果进行了比较。结果表明,与其他模拟策略相比,包含演化方程的模拟策略对混合层稳定火焰中的平均速度和火焰位置有较好的逼近效果。
Flame turbulence interaction is an important term for modelling scalar dissipation in premixed turbulent combustion. In order to obtain an accurate representation of the flame turbulence interaction phenomenon, an evolution equation for has recently been proposed. This equation gives a detailed insight into the flame turbulence interaction phenomenon and provides an alternative approach to modelling the important physics represented by. In this paper the evolution equation is used to model a premixed propane–air flame stabilised in a turbulent mixing layer. The simulations are carried out in the context of a Reynolds Averaged Navier–Stokes (RANS) framework and the results are compared with the experiments and also with Large Eddy Simulation (LES). It is found that the modelling strategy involving the evolution equation gives good approximations for the mean velocities and flame locations in the mixing layer stabilised flame when compared with other modelling strategies.
用于大涡和 RANS 模拟的预混合湍流燃烧模型
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影响因子: 8.7
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