boundary layer

The boundary layer thickens along the floor, slowing air before it reaches the diffuser.附面层沿底板不断增厚，在气流到达扩散器之前使其减速。

Vortex generators re-energise the boundary layer to delay separation over the sidepod.涡流发生器为附面层重新注入能量，以延迟侧箱上方气流的分离。