非均匀伴流中复合材料螺旋桨非定常空化流固耦合研究

As the application of composite materials can improve the cavitation performance and vibration characteristics of propellers, it has been widely concerned in the field of advanced marine propulsion equip⁃ ment. In this paper, the flow field of a composite material propeller was calculated based on URANS, the dy⁃ namic response of the blade structure was solved by FEM, and the hydrodynamic load and structural deforma⁃ tion were transmitted in real time bi-directionally. The simulation of the evolution of tip cavitation in the high wake region shows that the maximum tip deformation increases with the initiation and development of tip cavitation, reaches the maximum at the stage of tip vortex cavitation formation, and then decreases with the collapse of bubbles. The mechanism of the improvement of propeller propulsive efficiency and the sup⁃ pression of tip cavitation due to the application of composite materials was revealed, indicating that the com⁃ posite material propeller produces bending torsion coupling deformation under cavitation hydrodynamic load, and adaptively adjusts the angle of attack to suppress cavitation development. Comparison of the cavitation performance between the composite material propeller and the rigid propeller under typical cavitation condi⁃ tion reveals that the composite material propeller has a mild peak pressure fluctuation and a better adaptabili⁃ ty to the non-uniform wake.