The mass ratio and free streamturbulence have attained to considerably good level.
引射效率和气流的湍流度也达到相当好的水平。
2
For high levels of free-streamturbulence, streaky structures in boundary layer with the spanwise variations alternating will be generated.
对背景湍流度很大的流动，边界层中有时会产生沿展向周期分布的流向速度的条纹结构。
3
Meanwhile, the streamturbulence effects on the measurement are studied. Finally, the problems which must be researched further are presented for indicating boundary-layer transition.