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Open water performance comparison between hub-type and hubless rim driven thrusters based on CFD method

机译：基于CFD方法的轮毂型和无轮辋驱动推进器的开水性能比较

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The rim driven thrusters (RDT) have been designed both in hub-type and hubless type, but few comparison studies have been performed. This paper investigates the difference between open water performance of hub-type and hubless RDT by means of computational fluid dynamics (CFD) analysis. The Reynolds Averaged Navier-Stokes (RANS) equations were numerically solved by the commercial code CFX 14.0 with a multiple frames of reference (MFR) method. The accuracy of the numerical method was validated through verification and validation studies. Four pairs of hub-type and hubless rim driven thrusters having different hub radius were tested. The simulation results demonstrate that the hubless RDT efficiency is higher than that of the hub-type RDT. The hubless RDT also has a larger thrust, torque and a smaller thrust ratio. The reasons for the difference were also discussed in the present paper. The flow field details were also presented. (C) 2015 Elsevier Ltd. All rights reserved.
机译：轮缘驱动推进器（RDT）既设计有轮毂型也有无轮毂型，但很少进行比较研究。本文通过计算流体动力学（CFD）分析研究了轮毂型和无轮毂RDT的开放水性能之间的差异。雷诺平均Navier-Stokes（RANS）方程是通过商业代码CFX 14.0使用多参考框架（MFR）方法进行数值求解的。通过验证和验证研究验证了数值方法的准确性。测试了四对具有不同轮毂半径的轮毂型和无轮毂轮缘推进器。仿真结果表明，无轮毂RDT的效率高于集线器RDT。无轮毂RDT还具有较大的推力，扭矩和较小的推力比。本文还讨论了造成这种差异的原因。还介绍了流场细节。 （C）2015 Elsevier Ltd.保留所有权利。

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