Analysis of dynamic models for turbulent premixed combustion
Analysis of dynamic models for turbulent premixed combustion
复制标题
湍流预混燃烧动力学模型分析
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
V. Moureau
中科院分区：
文献类型：
--
作者：
By D. Veynante;T. Schmitt;M. Boileau;V. Moureau
很少有人尝试在大涡模拟中实现动态燃烧模型，而它们似乎是火焰表面密度平衡方程的一个有前途的替代方案，以处理火焰湍流和湍流不平衡的情况，如通常的代数公式所假设的那样。动态配方的火焰燃烧因子的研究，在这里，从先验（DNS）和后验测试。重点是：（i）模型处理层流火焰情况的能力;（ii）程序执行的效率，特别是在非结构化网格和大规模并行机器上;（iii）局部、时间和空间相关模型参数的确定。动态建模被发现是非常强大的，与可接受的额外成本。
Very few attempts have been made to implement dynamic combustion models in large eddy simulations, whereas they appear to be a promising alternative to flame surface density balance equations to handle situations where flame wrinkling and turbulence are not in equilibrium, as assumed in usual algebraic formulations. Dynamic formulations for the flame wrinkling factor are investigated here, from both a priori (DNS) and a posteriori tests. The emphasis is on: (i) the model’s ability to handle laminar flame situations; (ii) the efficiency of the procedure’s implementation, especially on unstructured meshes and massively parallel machines and (iii) the determination of local, timeand space-dependent model parameters. Dynamic modeling is found to be very powerful, with acceptable extra cost.