中文摘要：

无人自治水下航行器（AUV）的航程直接影响了其执行水下调查任务的能力,提高航程的关键在于减小其外形阻力及提高推进系统效率。根据航行器Myring外形的曲线方程及阻力求解公式,通过程序编写对不同外形参数下AUV的阻力进行迭代求解,获得了优化的低阻力外形;并根据AUV周围的流场结构,利用升力线理论设计了适用于无人自治水下航行器的高效率螺旋桨叶型。最后提出与螺旋桨相匹配电机的选择方案,以保证整个推进系统的效率最优。通过理论分析计算与工程实践相结合的方式,为中、小型大航程Myring外形AUV的阻力预报、艇型及推进系统设计提供了参考。

英文摘要：

he range of AUV directly affects its ability on underwater survey mission, in order to improve the range,reducing the resistance of its shape and increasing the efficiency of propulsion system are key technology. Firstly, based on the curve equations of Myring shape and the solving equations of resistance, program has been written to iterate the resistance of AUV using different shape parameters to get the optimized low-resistance shape. Secondly, according to the structure of the flow field around AUV, a proper and high efficiency propeller for AUV based on the lifting line theory was designed. Finally,in order to get an optimum propulsion system, the option about how to choose a suitable motor for propeller been designed is proposed. This paper provides a reference for medium and small long-range Myring shape AUV′s resistance prediction, shape optimization and design of propulsion system, through the combination of theoretical calculation and engineering practice.