煤量甏圆家重点实验宝 In basic region, the distribution of non-dimensional velocity is complete similar 1. e at corresponding points y Where vm-velocity at x axis yc -distance of points with velocity(1/2)vm with x axis National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cnNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn In basic region, the distribution of non-dimensional velocity is complete similar i. e. at corresponding points 1 2 1 2         =                 =         m x m x c c v v v v y y y y Where vm - velocity at x axis yc - distance of points with velocity (1/2)vm with x axis