导管螺旋桨的推力、进速与诱导速度沿盘面的分布特征

运用计算流体力学方法对在不同工况中导管螺旋螺旋桨的推力、转矩以及螺旋桨周围的流场特性进行观察,对导管螺旋桨盘面处的进速、诱导速度的沿盘面的分布以及螺旋桨所发出的推力与周围速度场之间的关系进行分析。计算结果表明,由于导管出口处激发出的下游尾涡作用,螺旋桨推力、转矩、盘面的进速以及诱导速度分量的时域过程表现出了一种多次峰谷值振荡变化的动力学特征；轴向进速是影响螺旋桨推力、转矩变化的主要因素。

Distribution characteristics of thrust, advanced and induced velocity components on ducted propeller disk

Thrust issued from and torque suffered by a ducted propeller, the flow fluid characteristics around the propeller under different working conditions are observed numerically with Computational Fluid Dynamic (CFD) method, distributions of axial advanced velocity, induced velocities on the propeller disk, and the relationships among propeller thrust and the flow fluid around the propeller are analyzed. Numerical results in our researches indicates that the time histories of thrust, torque of the propeller, axial advanced velocity, induced velocities on the propeller disk manifest a dynamic nature of multiple peak-to-valley value oscillations due to the trailing vortex agitation at the exit of the duct; axial advanced velocity is the dominant factor affecting the variations of thrust and torque of the propeller.