粘性流场中吊舱推进器水动力性能数值研究

Study on Hydrodynamic Performance of Podded Propulsion in Viscous Flow

应用滑移网格技术对粘性流场中吊舱推进器的水动力性能进行了数值模拟,成功预报了吊舱推进器在粘性流场中的敞水性能,和试验结果相比,推力系数最大偏差为2.9%,扭矩系数最大偏差为0.8%。考察了吊舱推进器各部件及周围的流动特征,包括压力分布、速度矢量分布、流线及涡的形态等,为吊舱推进器各部件的优化设计以及吊舱推进器在工程上的应用提供了详细的流场信息。

A numerical model of podded propulsor has been established, and the moving mesh is successfully applied to simulate the influence of running propeller. The open water performance characteristic of podded propulsor in unsteady viscous flow is numerically predicted, and the computed results are compared with the model test results, and the maximal difference of Kr is about 2.9%, KQ is about 0.8%. It shows that the prediction technique developed in this paper is feasible. Further more some significant hydrod）;namic phenomena of podded propulsor are focused and illustrated, including the pressure distribution on podded propulsor unit, the distribution of velocity vector around propeller plane and the characteristics of flow around the podded propulsor. The information of flow field is very helpful for optimizing of propulsion and for engineering applying.