基于CFD的拖式吊舱推进器斜流状态下数值模拟

采用FLUENT软件计算了某拖式吊舱推进器在直航以及斜流状态下的水动力性能.采用滑移面网格方法以模拟桨叶、支架、以及舱体之间的非定常干扰.文中首先计算了直航时不同进速系数下的桨叶推力系数、扭矩系数,并与实验结果进行了对比.计算了在不同斜流角(15°、30°、45°)、不同载荷系数时桨叶本身的推力系数、扭矩系数、侧向力系数与直航时(0°)的比较.文中还讨论了支架、舱体在直航以及不同斜流角时的侧向力问题,并将其大小与桨叶本身产生的侧向力进行了比较,部分计算结果与已有的实验值进行了比较、分析.

CFD Simulation for a Puller-type Podded Propulsor Operating at Helm Angles

The performance of podded propulsor operating at helm angles was studied by Fluent soft-ware package. While the interactions of the propeller blades with the pod and strut are time-depen-dent by nature,the sliding mesh model is used to simulate the unsteady characteristics of podded propulsor.This paper firstly calculates the thrust and toque coefficients of podded propulsor in straight forward motion which compared with the test data.The performance of podded propulsor op-erating at helm angles such as 15 degrees, 30 degrees, 45 degrees is studied with unsteady calcula-tion model. The thrust, lateral force and torque of blades at different helm angles are compared with those in straight forward motion. The thrust and torque fluctuation of the key blade are also given in one revolution.The lateral force of pod and strut are also discussed on the conditions of straight for-ward motion and at some helm angles.