水下自主航行器舵翼水动力性能分析

Hydrodynamic performance prediction on the rudder wing of autonomous underwater vehicle

针对300 kg级水下自主航行器尾舵设计的关键问题,采用三维计算流体力学方法,计算了梯形舵在不同航速下的流体力学性能,得到不同舵角条件下水下航行器舵翼的水动力性能与流场分布,分析了不同舵角水动力性能变化原因和声呐对垂直上舵产生的影响,同时对舵翼进行了优化设计.结果表明,当水下航行器正常航行时,舵翼攻角大于20°后,舵翼水动力性能明显下降.优化发现后掠7.71°的舵翼在理论上具有更好的水动力性能,为水下航行器的后续设计提供参考.

Aiming at the crucial issues in the design of a stern rudder for autonomous underwater vehicle,the hydrodynamic performance and the distribution of flow field with different rudder angles and different speed of the 300 kg autonomous underwater vehicle are investigated using 3Dcomputational fluid dynamics method.The reason of the hydrodynamic performance changing and the influence on top rudder by the sona have been analyzed.Optimal design for the rudder wing has also been made.The results show that the hydrodynamic performance of the rudder wing will decline obviously when the angle of the rudder wing is more than 20 degrees.The new rudder wing with7.71 degrees has better hydrodynamic performance than the formal one.The results have certain reference value for the follow-up design.