【摘要】 槽道推进器广泛应用于船舶与海工装备,准确、快速地预报其水动力性能是精准控制的基础。论文以一型槽道推进器为对象,研究标准槽道几何参数、螺旋桨转速及轴向来流速度对推力和扭矩径向分布的影响。螺旋桨推力和扭矩径向分布曲线的仿真结果显示,槽道推进器中螺旋桨的体积力径向分布与一般的主推器相比存在较为明显的区别,其主要影响因素为叶梢间隙,当叶梢间隙不变时,体积力径向分布基本稳定。采用论文拟合的分布函数得到的仿真结果与滑移网格方法相比,槽道推力的误差在5%左右。更多还原

【Abstract】 Tunnel thrusters are widely used in various types of ships and offshore engineering equipment, and are closely related to the maneuverability of marine vehicles. Accurate and rapid prediction of the hydrodynamic performance of the tunnel thrusters is the foundation for the precise control, and the body force model is a numerical simulation technique with the potential to achieve this goal. A type of tunnel thruster is considered as the main research object in this paper, and its hydrodynamic performance under various working conditions has been numerically simulated. The effects of various factors, such as the geometric parameters of standard tunnel, rotation speed and axial inflow velocity of the propeller, on the radial distributions of thrust and torque have been investigated. By observing the thrust and torque radial distribution curves obtained from the simulation results, it can be found that the radial distribution of the body force of the propeller in the tunnel thruster indeed differs significantly from that of a general main propeller. The primary influencing factor is the tip clearance. When the tip clearance remains unchanged, the radial distribution of the body force is basically stable, and moreover, the simulation results based on the fitting radial distribution of the body force obtained in this paper show that the error with respect to the tunnel thrust is about 5% comparing to that of sliding mesh method.更多还原