回转状态下导管螺旋桨水动力特性数值模拟..doc

回转状态下导管螺旋桨水动力特性数值模拟* 吴家鸣1 邓威1 赖华威2 (1. 华南理工大学 土木与交通学院，广东广州 510640， 2. 广东省南沙航道局，广东广州 511475) 摘要：采用滑移网格技术以计算流体力学方法在导管螺旋桨所在的流域内求解其N-S方程，以此对在作回转运动的水下机器人流场作用下导管螺旋桨的推力特性进行数值模拟，观察螺旋桨在这一环境下的水动力现象。计算结果表明：当来流从尾部流向机器人时，对于尾导管螺旋桨，有机器人影响时其推力系数要比无机器人时要小，对处于机器人舷侧的螺旋桨，有机器人时其推力系数比无机器人时要大，当来流从首部流向机器人时其情形则刚好相反；而当机器人轴线与流向大致垂直时，有无机器人对螺旋桨推力系数的影响不大。 关键词：导管螺旋桨；水下机器人；CFD；水动力学；回转运动 中图分类号：[TV131.2 ] 文献标识码：A Numerical simulation to the hydrodynamic characteristics of a ducted thruster in turning motion Wu Jia-ming1 Deng Wei1 Lai Hua-wei2 (1. College of Civil and Transportation Eng., South China Univ. of Tech., Guangzhou 510640, China, 2.Guangdong Nan Sha Waterway Bureau, Guangzhou 511475, China) Abstract: Computational fluid dynamics technique with sliding mesh technique is applied to solve the Navier-Stokes equations which govern the fluid motion around the duct, thruster and main body of underwater robot when the robot main body attached with the control duct thrusters is in a turning motion. Numerical simulation to investigate the propulsion characteristics of the thrusters in the turning motion under the flow fields of the robot main body is conducted, and the hydrodynamic phenomenon of the thrusters in such a condition is observed. Results of our simulation indicate that when the flow comes from robot stern the thrust coefficient of the stern thruster is smaller and the coefficient of the side thruster is greater under the influence of the robot’s main body flow fields than those without robot; when the flow comes from frontage of the robot, the situation is just contrary; while when the direction of incoming flow is approximately perpendicular with that of longitudinal axis of the robot, the influence of the robot to the thrust coefficient is unconspicuous. Keywords: Ducted thruster; underwater robot; CFD; hydrodynamics; turning motion 导管螺旋桨是常见的螺旋桨推进器家族中的一种类型。它在负荷较重时，其效率较普通螺旋桨为高，该类推进器尤其适用于渔船、拖轮、海洋工程工作船等多工况运行的水面船舶以及水下机器人等带缆遥控潜器作为其轨迹与姿态操纵的一种推进控制机构。如何正确地确定水面船舶以及带缆遥控水下潜器所使用的导管螺旋