Numerical Analysis of the Hydrodynamic Performance Impact of Novel Appendage on Rim-driven Thruster  

新型附体对轮缘推进器水动力性能影响的数值分析

作　　者：Hengxu Yang Dongqin Li Feng Zhang 杨恒旭;李冬琴;和张锋

机构地区：[1]School of Naval Architecture&Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China

出　　处：《哈尔滨工程大学学报(英文版)》2024年第4期762-775,共14页Journal of Marine Science and Application

摘　　要：Addressing the ongoing challenge of enhancing propulsion efficiency in rim-driven thrusters(RDTs),a novel energy-saving appendage was designed to mitigate energy dissipation and improve efficiency.Computational fluid dynamics was utilized to examine the disparities in openwater performance between RDTs with and without this appendage.The Reynolds-Averaged Navier–Stokes equations were solved using the Moving Reference Frame approach within the established STAR-CCM+software.The accuracy of these methodologies was confirmed through a comparison of numerical simulations with experimental data.A meticulous analysis evaluated the alterations in propulsion efficiency of RDTs pre-and post-appendage integration across various advance coefficients.Additionally,a comprehensive assessment of thrust and torque coefficient distributions facilitated a comprehensive understanding of the appendage’s energy-saving potential.Results demonstrated that the new appendage diminishes the diffusive wake behind the rotor disk,fostering a more uniform flow distribution.A notable reduction in the lowpressure zone on the rotor blade’s thrust side was observed,accompanied by an elevation in the high-pressure area.This generated a distinct pressure disparity between the blade’s thrust and suction sides,mitigating the low-pressure region at the blade tip and reducing the likelihood of cavitation.The manuscript further elucidates the rationale behind these alterations,providing detailed insights into flow field dynamics.

关 键 词：Rim-driven thruster Novel appendage Computational fluid dynamics Moving reference frame methodology Propulsion efficiency 

分 类 号：O35[理学—流体力学]