As the air proceeds along the test section the boundary layer thickens . 当空气沿着试验段流动时附面层逐渐变厚。
In order to minimize the boundary layer effects, the nozzles were made as short as possible . 为了减少附面层效应,喷咀做得尽可能地短些。
Airplanes drag along a very thin shield of motionless air known as a boundary layer . 飞机拽着一层很薄的紧贴机面不动的空气一道向前运动,这层空气叫做附面层。
As the velocity in the nozzle throat is sonic, the effect must be transmitted upstream through the boundary layer . 当喷管喉部达到音速时,这种影响一定是通过附面层向上传播而引起的。
Inasmuch as the contoured walls are usually overcorrected for their own boundary layer, the flow in the planes parallel to the flat walls diverges . 只要曲壁附面层的修正通常是超过需要量的,平行于平壁的平面上流动就发散。