复合材料螺旋桨水动力性能与结构响应数值研究

通过CFD计算复合材料螺旋桨水动力载荷，应用有限元法计算复合材料桨结构响应，并基于双向耦合算法实现复合材料螺旋桨在均匀来流下的流固耦合数值模拟.研究了不同进速系数和不同铺层角度工况复合材料螺旋桨的水动力性能及结构响应.结果表明，在进速系数J ≤ 0.8时，复合材料螺旋桨的推进效率明显高于同工况下的金属螺旋桨.随进速系数增加，复合材料螺旋桨推进效率先增加后减小，在进速系数J = 0.8时取得最大值.桨叶总变形和等效应力分布与铺层角度有较大关系.复合材料螺旋桨的螺距角较金属螺旋桨减小，减小的螺距角与桨叶攻角的变化相匹配，自适应地提高了该螺旋桨的推进效率. 

Numerical Investigation on Hydrodynamic Performance and Structural Response of Composite Propeller

In this paper, the hydrodynamic load of the composite propeller was calculated based on computational fluid dynamics (CFD),FEM was used to calculate structural response of composite blades. Based on the bidirectional coupling algorithm, the fluid-structure interaction simulation of the composite propeller under uniform flow was carried out. The hydrodynamic performance and structural response of the composite propeller with different advance coefficients and different ply angles were studied. The results show that, the propulsive efficiency of the composite propeller is higher than that of rigid propeller when advance coefficient J ≤ 0.8. With the increase of advance coefficient, the propulsive efficiency of the composite propeller increases first and then decreases, the maximum value can be obtained when advance coefficient J=0.8. The distribution of total deformation and equivalent stress of the blades are great related with ply angles. Compared with the metallic propeller, the pitch angle of the composite propeller is smaller. When the reduced pitch angle matches the change of the attack angle, the propulsive efficiency of the propeller can be improved adaptively.