流线型高速ROV螺旋桨水动力性能分析

Analysis of hydrodynamic performance of propeller in streamlined high-speed ROV

对一种流线型高速ROV导管螺旋桨和槽道螺旋桨的水动力性能进行仿真分析,得到2种螺旋桨的水动力特性曲线。将螺旋桨的推力和ROV的阻力进行对比计算,验证了流线型高速ROV设计的可行性。在敞水下,仿真得到导管螺旋桨推力、扭矩及效率曲线,并与图谱曲线对比,证明了数值仿真的可行性。在静水下,计算了不同转速时槽道螺旋桨的推力性能,得出推力与转速平方对应的曲线。在不同航速下,计算了槽道螺旋桨一定转速时对应的推力和扭矩,发现在一定航速下槽道螺旋桨失去效率。通过压力云图的分析看出,当流速增大时,在高速ROV表面产生负向的压力使整个螺旋桨的推力减小。通过数值模拟得到的结果,具有工程实用价值,为后续的运动控制打下基础。

Based on the structural appearance of a streamlined High-Speed ROV,the hydrodynamic performance of the ducted propeller and the channel propeller was simulated by computational fluid dynamics software.By compared the thrust of the propellers with the resistance of the high speed ROV,the feasibility of the design of the streamline ROV design is verified.Under the open water,the thrust,torque and efficiency curves of the ducted propeller were compared with the spectrum curves,which proves the feasibility of numerical simulation.Under static water,the thrust performance of the channel propeller at different speeds was calculated,and the curve corresponding to the thrust and the square of the speed was plotted.At different flow rates,the corresponding thrust and torque were calculated for a certain speed of the channel propeller,and it was found that the channel propeller lost efficiency at a certain flow rate.Through the analysis of the pressure cloud map,the results show that when the flow velocity increases,a negative pressure is generated on the surface of the HighSpeed ROV,so that the thrust of the entire propeller is reduced.The results obtained from numerical simulation have practical value in engineering and lay a foundation for the follow-up motion control.