湍流燃烧数值模拟的研究与进展精要.ppt

大涡模拟（LES） Bluff-body Flame 六、湍流燃烧数值模拟的进展 EU Project “Heat Flux” AVL DGI - Mechanisms of NO Formation Temperature Equivalence Ratio NO Mass Fraction 720° CA Local / Global Quantities Temporal Evolution of Global Quantities Red: High Values Blue: Low Values * * * * Stream function Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 Turbulent kinetic energy Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s2] Turbulent dissipation Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s3] Mean mixture fraction: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 Mixture fraction variance: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 Mean temperature Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [K] Reynolds stress: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s2] Reynolds stress: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s2] Reynolds stress: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s2] Reynolds stress: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m2/s2] Reynolds flux: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m/s] Reynolds flux: Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [m/s] Reynolds flux: k-e model / Fast chemistry Bluff-body stabilised flame CH4/H2 [m/s] k-e model / Fast chemistry Reynolds flux: Bluff-body stabilised flame CH4/H2 [m/s] Turbulent viscosity Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 [kg/m.s] Mean mass fraction of OH Full second moment closure / Fast chemistry Bluff-body stabilised flame CH4/H2 （2）计算结果 轴向速度U（x/D = 0.2） 四、非预混湍流火焰的数值模拟 （2）计算结果 轴向速度U（x/D = 1.0） 四、非预混湍流火焰的数值模拟 （2）计算结果 轴向速度U（