不同湍流预混燃烧模型在本生灯火焰中的比较

A Comparison of Three Different Turbulent Premixed Combustion Models in Busen Flames

湍流预混燃烧的大涡模拟数值计算近来受到很大的关注,为了进一步发展湍流预混燃烧模型,利用正在发展的湍流预混燃烧模型等值面集合的G函数方法、层流预混火焰生成流型的化学热力学建表FGM方法、G函数/FGM耦合方法三种燃烧模型,对甲烷/空气湍流本生灯火焰进行了大涡模拟计算,并对上述燃烧模型进行了比较。大涡模拟结果表明,G函数方法能够较为准确捕捉火焰的传播特性,FGM方法能够捕捉到火焰和湍流的相互作用,但无法准确预测火焰的传播特性。而耦合的方法既可以捕捉火焰的传播特性,又能够捕捉到火焰和湍流的相互作用。

Turbulent premixed combustion modeling in large eddy simulation (LES) has attracted a lot of attention. In order to develop turbulent combustion model,in this work,three combustion models including G-equation,flamelet generated manifolds (FGM) method and the coupled G-FGM method were applied to simu-late the turbulent methane/air Busen flame using LES. The predictions of these models were compared in detail. The results indicate that G-equation method could capture the flame propagation precisely. FMG method takes the interaction of turbulence and flame into consideration but cannot predict the flame propagation exactly. The coupled levelset/FGM method could have both advantages so that it has potential applications.