三维柔性悬臂水翼变形模式对水翼水动力性能的影响OA

To investigate the influence of the dynamic deformation of the flexible cantilever hydrofoil on its hydrodynamic performance,a flexible cantilever hydrofoil was taken as the research object.Firstly,the key parameters characterizing its deformation characteristics were extracted,and the mathematical model of flexible cantilever hydrofoil deformation was established.Then,using the dynamic grid tech-nology,the effects of hydrofoil bending torsional coupling deformation and single deformation(bending vibration and torsional vibration)on hydrofoil hydrodynamic performance under three typical hydrofoil attack angles of 2°,4°and 6°were analyzed.The results show that torsional deformation has a more significant impact on the hydrodynamic performance of hydrofoils compared to bending deformation.Along the spanwise direction from the constrained end to the free end,the amplitude of the deformation frequency in spectrum gradually increases.At larger angles of attack,the lift and drag coefficients near the constrained end of the hydrofoil are influenced by the coupling of deformation frequency and vortex shedding frequency.On the pressure side,the pressure fluctuation amplitude distribution corresponding to bending and torsional frequencies exhibits substantial differences,and the pressure fluctuation am-plitude distribution characteristics of combined deformation can be regarded as a superposition of those corresponding to bending and torsional frequencies.