复合材料螺旋桨尾流场的数值模拟

为了分析复合材料螺旋桨的变形对桨后尾流场分布的影响,利用商业软件FLUENT和ANSYS有限元建立了一种流固耦合方法,基于此方法分析了桨叶变形对螺旋桨压力分布以及尾流场分布的影响。研究结果表明,变形后桨叶两侧压差增大;在螺旋桨尾流场中,变形对各速度分量周向分布的影响随半径增大而增大;在0.9R(R为螺旋桨半径)处,切向速度在变形后减小约30%,轴向诱导速度减小约20%,径向速度增值在0.1m/s内。变形后轴向速度低速度区域增大,径向速度正速度区域增大,叶根处切向速度增大,叶稍处切向速度减小。

Numerical simulation of flow field behind the composite marine propeller

In order to investigate the influence of the blade deformation on the flow field behind the composite marine propellers, a fluid-structure interaction method which is based on commercial software FLUENT and ANSYS FEM was built. Based on this method, the effects of the blade deformation on the flow field and the pressure around the blade were investigated. The numerical results show that, the pressure increases on account of the blade deformation. Due to the blade deformation, the influence on circumferential distributions of velocity components increase as the radius increases. The decreasement of the induced tangential velocity of the deformed propeller can be about 30%, the inducted axial velocity can be 20% and the induced radial velocity may augment 0.1m/s when r/R=0.9. Both of the low velocity zone of the inducted axial velocity and the positive velocity zone of the inducted radial velocity increase because of the deformation. The inducted tangential velocity of the blade root increases while the inducted tangential velocity of the blade tip decreases.