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Numerical prediction analysis of the fluctuating pressure and rudder force of full-scale hull-propeller-rudder system

机译：满量程桨叶舵系统脉动压力和舵力的数值预测分析

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摘要

In order to analyze the fluctuating pressure and rudder force characteristics of a full-scale hull-propeller-rudder system, a hybrid structured/unstructured grid was combined with the Reynolds-averaged Navier-Stokes (RANS) and volume of fluid (VOF) methods to perform a numerical prediction of model and full-scale performance for the Kriso Container Ship (KCS) case. A numerical simulation for the self-propulsion test of a full-scale ship was first performed to obtain the propeller velocity under the self-propulsion point, the results of which indicated a notable wake fraction and velocity scale effect at the self-propulsion point. Transient two-phase flow calculations were then performed for the model and full-scale KCS hull-propeller-rudder systems. According to the monitoring data, the hull surface fluctuating pressure and rudder force fluctuated periodically over time and the full-scale fluctuating pressure exhibited a higher time-average value as compared to the model-scale pressure. The frequency spectrum curves were also generated by the fast Fourier transform algorithm. The analysis of the frequency spectrum data indicated that the peaks of the fluctuating pressure and rudder force reached their respective maximums at the blade passing frequency (BPF), after which the peak gradually decreased and the full-scale ship reduced more quickly. Furthermore, fluctuating amplitude of full-scale ship was bigger than model scale.
机译：为了分析全尺寸船体-螺旋桨系统的波动压力和舵力特性，将混合结构/非结构网格与雷诺平均Navier-Stokes（RANS）和流体体积（VOF）方法相结合对Kriso集装箱船（KCS）案例进行模型和全面性能的数值预测。首先对大型船舶的自推进试验进行了数值模拟，以得出自推进点下的螺旋桨速度，其结果表明在自推进点处有明显的尾流比和速度比例效应。然后对模型和全尺寸KCS船体-螺旋桨/舵系统进行了瞬态两相流计算。根据监测数据，船体表面波动压力和方向舵力随时间周期性波动，并且满量程波动压力与模型比例压力相比具有更高的时间平均值。频谱曲线也通过快速傅立叶变换算法生成。频谱数据分析表明，脉动压力和舵力的峰值在叶片通过频率（BPF）达到各自的最大值，此后峰值逐渐减小，而满载船则更快地减小。此外，全尺寸船舶的波动幅度大于模型尺寸。

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  • 来源
    《Ocean Engineering》 |2018年第1期|580-590|共11页
  • 作者

    Sun Cong; Wang Chao; Sun Sheng-xia; Chang Xin; Zhang Liang;

  • 作者单位

    Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Full-scale; Propeller; Free surface; Fluctuating pressure; Rudder force; Scale effect;

    机译：满刻度;螺旋桨;自由表面;波动压力;舵力;刻度效果;

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