复合材料螺旋桨水动力特性的流固耦合数值模拟

为了分析复合材料螺旋桨变形对其水动力性能的影响,利用FLUENT和ANSYS结构模块建立了一种流固耦合的方法。基于此方法分析了桨叶变形对敞水曲线,桨叶附近流场及其表面压力的影响。研究结果表明,初始几何为无侧斜无纵倾的螺旋桨变形后纵倾发生改变,使推力和扭矩系数变大,且推力系数和扭矩系数的增值随进速系数减小而增大。变形后的螺旋桨桨叶表面压力增大,压力系数变化最大值可达40%,螺旋桨轴向诱导速度变化最大值可达18.7%。

Numerical Simulation of Hydrodynamic Performance for a Composite Marine Propeller Based on Fluid-structure Interaction

In order to investigate the influence of the blade deformation on the hydrodynamic performance of the composite marine propellers, a fluid-structure interaction method was built based on FLUENT and ANSYS structural module. Based on this method, the effects of the blade deformation on open-water curves of the propeller, the flow field around the blade and the pressure on the blade were investigated. The numerical results show that, both of the thrust and torque coefficients increase when the blade deformation is considered, and the more the advance coefficient decreases, the greater the variation is, which is because the skew and the rake for the blade is not zero any more. Due to the blade deformation, the pressure on the blade surface increases, the pressure coefficients may augment for about 40%, and the increasement of the induced axis velocity of the propeller can be about 18.7%.