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首页> 外文期刊>The Transactions of the Royal Institution of Naval Architects >NUMERICAL ASSESSMENT OF SELF-PROPULSION FACTORS FOR A FAST DISPLACEMENT HULL USING DIFFERENT THEORETICAL APPROACHES
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NUMERICAL ASSESSMENT OF SELF-PROPULSION FACTORS FOR A FAST DISPLACEMENT HULL USING DIFFERENT THEORETICAL APPROACHES

机译：应用不同的理论方法对快速位移船体自推进因素进行数值评估

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摘要

Abstract -This work reports the flow analysis in the hull-stern region and the hull-propeller interactions of a Fast Displacement hull using the commercial URANS code CD Adapco Star CCM+r In the present study resistance and self-propulsion test simulations were conducted to get self-propulsion factors (the wake and thrust deduction factors), using the Computational Fluid Dynamics (CFD) techniques. The computational results were compared with the benchmark towing tank data. The simulation of self-propulsion test is a non-trivial task for the high speed craft, in particular defining the correct trim and so the correct wake field. The reliability of the results is strictly connected to the high quality of the resistance test simulation and to the propeller-modelling method. The purpose of the current study is to provide reliable and fast results of self-propulsion test simulation for the Fast Displacement hulls. For these reasons, starting from different propeller-modelling method (i.e. the Actuator Disk and the Fully Discretized Propeller) the results were compared in terms of accuracy and computational effort. Furthermore, to take into account the hull motion and the propeller motion the overset mesh technique was employed.
机译：摘要-这项工作报告了使用商用URANS代码CD Adapco Star CCM + r进行的船体尾部区域的流动分析和快速排水船体的船体-推进器相互作用。在本研究中，进行了阻力和自推进试验模拟使用计算流体动力学（CFD）技术获得自推进因子（尾流和推力减小因子）。计算结果与基准拖船数据进行了比较。对于高速飞行器，自推进测试的仿真是一项艰巨的任务，特别是定义正确的内饰以及正确的尾流场。结果的可靠性与电阻测试仿真的高质量和螺旋桨建模方法紧密相关。本研究的目的是为“快速位移”船体提供可靠，快速的自推进试验仿真结果。由于这些原因，从不同的螺旋桨建模方法（即执行器盘和完全离散螺旋桨）开始，对结果进行了准确性和计算量方面的比较。此外，考虑到船体运动和螺旋桨运动，采用了过冲啮合技术。

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