自由状态冰对螺旋桨水动力性能的影响

Effect of free-moving ice on hydrodynamic performance of a propeller

为了研究自由状态冰条件下的冰桨非接触干扰,本文采用重叠网格与流体-固体相互作用方法分别对冰桨非接触模型中冰块位移以及螺旋桨水动力性能进行了模拟,与实验结果的对比证明了该方法的可行性。研究发现:自由状态冰后面存在“加速区”与“阻塞区”,随着冰块的靠近,阻塞区对螺旋桨的影响增大;随进速系数的增加,螺旋桨的推力系数和扭矩系数都会下降。

To study the non-contact interference between ice and a propeller under free-ice conditions,we used overlapping grids and the dynamic fluid-body interaction method in a non-contact ice-propeller model to simulate the ice displacement and the propeller hydrodynamic performance.A comparison of the simulation results with those obtained experimentally demonstrates the feasibility of this method.The results of this study show that there are“acceleration”and“blockage”zones behind the free ice.As an ice block approaches,the influence of the blockage zone on the propeller increases.With increases in the speed coefficient,both the propeller thrust and torque coefficients decrease.