4层流火焰层流预混火焰 火焰前锋 SL 未燃气→Vu U Vb—已燃气 U=1-S The State Key Lab of Coal Combustion, HUS 2021/2/22 Wuhan 430074 P. R. CHINAThe State Key Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: lqzhang@263.net 2021/2/22 U v S a u L = − 未燃气 vu vb 已燃气 火焰前锋 Ua 层流火焰 ------层流预混火焰 SL