摘要
该文基于湍流的ｋ－ε模型和改进的ＥＢＵ－Ａｒｈｅｎｉｕｓ燃烧模型，对有障碍物情况下的湍流加速火焰现象建立了两维均相反应模型。障碍物对流场的影响不仅考虑到采用空度函数，还考虑了障碍物对流动产生的附加阻力的作用。壁面边界层区域则采用壁面函数法处理。选取Ｓｉｍｐｌｅ格式数值求解，其计算结果模拟了障碍物诱导的湍流与燃烧耦合作用下的流场的发生和发展的全过程，揭示了障碍物、湍流。
Based on the k-ε turbulent model and the improved EBU Arrhenius combustion model, the phenomena that the turbulence induced by obstacles will accelerate flame. The influence of obstacle is considered by specifying volume and area porosity and the additional source term in equations. The wall function is chosen to treat the near wall regions and the SIMPLE scheme is adopted to solve the equations. The developing process during which the turbulent flow induced by obstacles is coupled with the combustion.The positive feed back mechanism of mutual acceleration between turbulent flow and flame is expounded.
出处
《南京理工大学学报》
EI
CAS
CSCD
1999年第2期109-112,共4页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金
