摘要
采用稳态层流火焰面模型来描述湍流-火焰之间的相互作用,在某种程度上实现了流动和化学反应之间的解耦,能够以较少的计算量比较好地预测多种燃烧现象,非常适合在工程中推广应用。采用自由单元法来克服工程中的复杂几何模型划分网格的难题,自由单元法只需要在计算区域内布置一定数量的散点,用于离散控制方程。分别对层流对撞非预混火焰、二维非预混层流伴流火焰、湍流非预混对撞火焰、燃烧器湍流非预混燃烧进行了数值模拟。将计算结果与参考值进行了对比研究,验证了自由单元法模拟湍流燃烧过程的正确性与有效性。
In this study,the steady laminar flamelet model is used to describe turbulence-flame interaction,which realizes the decoupling between the flow and the chemical reaction,is able to predict a variety of combustion phenomena well with less computational effort,and proves suitable for application in engineering.The free element method,which only requires a certain number of points to be arranged in the computational area for discretizing the control equations,is employed to overcome the difficulty of complex geometry in engineering.Numerical simulations of laminar counterflow non-premixed flames,two-dimensional axisymmetric co-flow non-premixed methane-air laminar flame,turbulent counterflow non-premixed flame,and burner turbulent non-premixed flame are conducted,respectively.The computational results are studied in comparison with the references to verify the correctness and effectiveness of the free element method in modeling the turbulent combustion.
作者
丁金兴
刘华雩
高效伟
DING Jinxing;LIU Huayu;GAO Xiaowei(State Key Laboratory of Structural Analysis for Industrial Equipment,School of Mechanics and Aerospace Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2024年第11期249-258,共10页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(12072064)。
关键词
湍流燃烧
自由单元法
稳态层流火焰面模型
层流对撞火焰
湍流非预混火焰
turbulent combustion
free element method
steady laminar flamelet model
laminar counterflow flame
turbulentnon-premixedflame
