Attaching it to the shaft of propeller with rotary duct will lead to a better result.
若在转动导管螺旋桨上加装PBCF，其效果更佳。
2
Viscous flow around a ductpropeller under open water condition was simulated by solving RANS equations, and the characteristic of the flow field was described.
采用求解RANS方程的方法对某导管桨敞水流场进行数值模拟，并对导管桨流场特点进行分析。
3
Once the rotors are fitted, they'll cut through the material, creating a channel that reduces the clearance between the propeller top and duct wall.