偏转工况下吊舱推进器的敞水性能

Open Water Performance of POD Propeller Under Deflection Condition

为研究不同偏转角下吊舱推进器敞水性能的变化规律,采用计算流体动力学(Computational Fluid Dynamics,CFD)方法模拟吊舱推进器在敞水中的运转,基于SSTk?ω模型进行数值研究。结果表明:吊舱推进器的敞水性能曲线与螺旋桨相似,桨叶叶面和叶背的导边分别产生压力和推力。推力系数及其增幅均随偏转角的增大而增大,各偏转角下推力系数曲线的差异随进速系数的增加而增大。随偏转角增大,转矩系数单调增大,其随进速系数的变化趋势逐渐由下降变为上升。在偏转角为0°～40°时,总体上敞水效率随偏转角的变化呈降低趋势,但当进速系数较大时,敞水效率则先减小后增加。

The change rules of the open water performance of POD propeller under different deflection angles are investigated. Computational Fluid Dynamics (CFD) method is adopted to simulate the working of POD propeller in open water based on SST k ω model. The results show that the open water performance curves of POD propeller are similar to those of the propeller, and the leading edges of the blade surface and blade back provide pressure and thrust, respectively. Thrust coefficient and its implementation increase with the increase of deflection angle, and the differences in the thrust coefficient curves under different deflection angles increase with the increase of advance coefficient. With the increase of deflection angle, torque coefficient increases monotonously, and its variation trend changes with the advance coefficient from decline into rise. When the deflection angle is in the range of 0° to 40°, the variation trend of open water efficiency with deflection angle is generally descending. When the advance coefficient is relatively high, the open water efficiency for large deflection angle gradually exceeds that for little deflection angle.