基于FGM的湍流射流扩散火焰超大涡模拟

Very Large Eddy Simulation of Turbulent Jet Diffusion Flame Based on FGM

为了研究超大涡模拟(VLES)预测湍流燃烧问题的能力,本文采用VLES结合基于假定概率密度函数的火焰面生成流型(FGM)建表湍流燃烧模型对值班甲烷/空气湍流射流扩散火焰(Sandia Flame D)开展了高精度数值研究,并与实验结果进行了详细比较。结果表明本文发展的VLES-FGM方法可以较准确地预测出湍流射流扩散火焰中的非稳态燃烧过程,且VLES湍流模拟方法对于湍流燃烧问题具有较大的应用潜力。

To study the performance of Very-Large Eddy Simulation(VLES)in prediction of turbulent combustion,the present study applied VLES method,combined with the FGM model based on the presumed probability density function,to simulate the piloted methane/air turbulent jet diffusion flame(Sandia Flame D).The simulated results are compared with the experimental data in detail.It is found that the proposed VLES-FGM method can accurately predict the turbulent jet diffusion flame,and the VLES method has high potential for the application of turbulent combustion simulation.