Impact of numerical method on auto-ignition in a temporally evolving mixing layer at various initial conditions

22nd Fluid Mechanics Conference

物理学;力学

Rosiak, A.^1 ; Tyliszczak, A.^1

Czestochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, Al.Armii Krajowej 21, Czestochowa

42-201, Poland^1

关键词: Auto-ignition;    Discretization method;    Flame development;    Implicit large Eddy simulations;    Initial conditions;    Mixing layers;    Numerical approaches;    Turbulent mixing layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/760/1/012027/pdf
DOI  :  10.1088/1742-6596/760/1/012027

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Numerical analysis of the auto-ignition of turbulent mixing layer between the cold fuel (hydrogen) and hot oxidizer (air) is presented. The research were performed using an Implicit-Large Eddy Simulation (ILES) method with attention on auto-ignition time, flame kernel localisation and propagation. We focused on an impact of discretization method on auto-ignition scenario and flame development. The results obtained showed that numerical approach plays an important role and to some extent may falsify the results, especially for low oxidiser temperatures.