Computational fluid dynamics study of the motion stability of an autonomous underwater helicopter
Computational fluid dynamics study of the motion stability of an autonomous underwater helicopter
复制标题
自主水下直升机运动稳定性的计算流体动力学研究
DOI：
10.1016/j.oceaneng.2017.07.020
复制
发表时间：
2017-10-01
影响因子：
5
通讯作者：
Chen, Ying
中科院分区：
文献类型：
--
作者：
Chen, Chen -Wei;Jiang, Yong;Chen, Ying
为了更好地完成管道维护、移动观测网、资源勘探和等深导航等复杂的水下任务，本文对一种新型自主水下航行器（AUV）——“自主水下直升机”（autonomous underwater helicopter， AUH）的运动稳定性进行了分析。使用ICEM网格生成工具创建AUH的Reynolds平均Navier-Stokes （RANS）网格。采用基于ranss的计算流体动力学（CFD）技术ANSYS-CFX分析了AUH的运动稳定性和在水平和垂直平面上的机动性。利用RANS求解器分析了AUH的关键水动力技术问题，包括配置选择和权衡研究，包括计算压力分布和安装在AUH上的不同长度的水生换能器的比较，以增强水动力性能。基于由线性流体动力导数组成的六自由度运动方程，利用RANS求解器对优化后的服务航速为13节的AUH实现了Routh运动稳定性准则。仿真和实验结果表明，该系统具有良好的运动稳定性，可提高水下航行中平移和旋转运动的机动性。结果表明，附加船体的设计结构可以应用于水下航行器。
In this study, the motion stability of a new type of autonomous underwater vehicle (AUV) named an "autonomous underwater helicopter (AUH)" with a disk-shaped hull was analyzed to better accomplish the complex tasks under the sea, namely, pipeline maintenance, mobile observation network, resources exploration, and isodepth navigation. A Reynolds Averaged Navier-Stokes (RANS) grid for the AUH was created with an ICEM mesh generation tool. The RANS-based computational fluid dynamics (CFD) technique, ANSYS-CFX, was adopted to analyze the AUH's behavior, including its motion stability and maneuverability in the horizontal and vertical planes. Pivotal hydrodynamic technical issues including configurations selection and a trade-off study of the AUH were analyzed with the RANS solver, including computed pressure distribution and comparison of different lengths of aquatic transducers mounted on the AUH for enhanced hydrodynamic performance. The Routh motion stability criterion based on the 6-DOF equations of motion consisting of linear hydrodynamic derivatives was implemented by the RANS solver for the optimized AUH with a service speed in the range of 13 knots. The simulation results and experimental tests show that the AUH has ample motion stability for enhanced maneuverability in translational and rotatory motion during under-sea navigation. The results suggest that design configurations of the appended hull can be used on AUVs.