侧斜变化对螺旋桨水动力及变形振动特性的影响

由于艇后伴流场的不均匀性,螺旋桨运转时,周期性变化的载荷与桨叶结构的耦合作用会使桨叶发生变形。基于ANSYS Workbench平台,利用ACT_Transient FSI技术,将Fluent结果直接转换导入有限元求解器来计算螺旋桨结构响应,从而实现艇后螺旋桨瞬态单向的耦合分析。以DTMB 4381,DTMB 4382和DTMB 4383桨为研究对象,对艇后螺旋桨的水动力特性及桨叶的变形等进行数值模拟。结果表明:随着螺旋桨侧斜角的增加,脉动推力振荡明显减弱,桨叶最大变形量增加,但桨叶振动明显减弱。

Effects of blade skew on the hydrodynamic and deformation performance of propellers

During the operation of submarine propellers, the fluid mechanical pressure load on the blades could result in a structural load on the component, which in turn causes deformation of the blade. In this pa-per, the structural response is analyzed with the finite element method, and the coupling simulation is ac-complished by using ACT_Transient FSI in ANSYS Workbench. The geometries of the propeller DTMB 4381~4383 are then taken as the research objects, where the deformation characteristic and hydrodynamic performance of these propellers are studied. The results show that the max blade displacement worsens with the increase of skew angles, and the vibration of the blade decreases simultaneously.