超声速湍流燃烧G/Z方程模型验证

Validation of G/Z equation model in supersonic turbulent combustion

中文关键词: 超声速  部分预混燃烧  G方程  Z方程

英文关键词: supersonic, partially premixed combustion, G equation, Z equation

中文摘要:

      为了研究超声速条件下的部分预混燃烧，引入一种基于level set 重构方法和稳态火焰面数据库的G/Z方程模型，并利用德国宇航中心的DLR支板算例对G/Z方程模型进行了验证。结果显示超声速湍流燃烧G/Z方程模型可以捕捉到部分预混燃烧现象，数值模拟结果与实验结果吻合较好，验证了G/Z方程模型运用到超声速部分预混条件下湍流燃烧流场计算的可行性。同时，超声速湍流燃烧G/Z方程模型依赖于运用到的火焰传播速度模型与火焰面模型，模型精确度的提高有待进一步探究。

英文摘要:

      A model combining level set G equation and steady flamelet Z equation was applied in supersonic partially premixed combustion in this study. The model was validated against the strut-injection supersonic combustion flow field designed by the German Aerospace Center. The predictions which captured the partially premixed combustion are in good agreement with the experimental data. Further discussions show that the combination of G equation and steady flamelet Z equation could capture the characteristics of partially premixed combustion under supersonic condition. And it is possible to apply this method to the simulation of the partially premixed combustion under supersonic condition. However, the model accuracy depends on both the turbulent burning velocity model and the flamelet model, which requires further investigation.