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首页> 外文期刊>Ocean Engineering >RANS simulation of open propeller dynamic loads in regular head waves considering coupled oblique-flow and free-surface effect
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RANS simulation of open propeller dynamic loads in regular head waves considering coupled oblique-flow and free-surface effect

机译：考虑耦合斜流动和自由表面效应，Rans仿真开放式螺旋桨动态载荷

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摘要

To offer references for ventilation and load fluctuation of propeller in actual seaway, this paper presents a RANS (Reynolds-Averaged Navier-Stokes equations) investigation on open propeller dynamic loads in regular head waves at variant submergence depths, from the perspective of the coupled oblique-flow and free-surface effect. Discussions are made concerning the dynamic integral loads and single-blade loads (both axial and in-plane), and instantaneous single-blade loads at different azimuthal positions. CFD (Computational Fluid Dynamics) verification and validation are conducted based on an experiment in calm water and regular head waves conducted in a circulating water channel. As conclusions, under fully-submerged condition, single-blade load variations are related solely to the unsteady oblique-flow environment, with shifts of azimuthal positions corresponding to the maximum and minimum thrust and torque due to inflow non-uniformity. Under periodical-emerging condition, high-frequency integral-load fluctuations are identified by both simulation and experiment, resulting from the enhanced propeller-surface interactions due to upward wake inclination; this enhanced propeller-surface interaction also causes serious ventilation, abrupt rises or drops of axial single-blade loads, and destruction and dissipation of propeller vortex system. Furthermore, the self-induction effect on the load distribution nonuniformity is found to be unobvious in regular waves due to the unsteady and non-uniform inflow environment.
机译：本文提出了螺旋桨通风和负荷波动的参考，从耦合斜视的角度来看，本文提出了一种RANS（雷诺平均海军 - Stokes方程）对常规潜水深度的常规头波的开放式螺旋桨动态载荷调查 - 流和自由表面效果。讨论是关于动态整体载荷和单叶片负载（轴向和面内）的讨论，以及在不同方位角处的瞬时单叶片载荷。 CFD（计算流体动力学）验证和验证是基于在循环水通道中进行的平静水和常规头波的实验进行的。结论，在完全浸没条件下，单刀片负载变化仅与不稳定的斜流环境相关，具有与流入不均匀性引起的最大和最小推力和扭矩相对应的方位角的换档。在期刊新兴条件下，通过模拟和实验识别高频积分负荷波动，由增强的螺旋桨 - 表面相互作用引起的仿真和实验识别出来的;这种增强的螺旋桨表面相互作用也引起严重的通风，突然升高或轴向单叶片载荷，以及螺旋桨涡流系统的破坏和耗散。此外，由于不稳定和不均匀的流入环境，发现对负载分布不均匀性不均匀性的自诱导效应在常规波处是不吸收的。

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  • 来源
    《Ocean Engineering》 |2021年第15期|108741.1-108741.24|共24页
  • 作者

    Zhang Wencan; Ma Ning; Gu Xiechong; Feng Peiyuan;

  • 作者单位

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai Peoples R China|Shanghai Jiao Tong Univ Collaborat Innovat Ctr Adv Ship & Deep Sea Explor Shanghai Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai Peoples R China|Shanghai Jiao Tong Univ Collaborat Innovat Ctr Adv Ship & Deep Sea Explor Shanghai Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai Peoples R China|Shanghai Jiao Tong Univ Collaborat Innovat Ctr Adv Ship & Deep Sea Explor Shanghai Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai Peoples R China;

    Marine Design & Res Inst China Shanghai Key Lab Ship Engn Shanghai Peoples R China;

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

    Open propeller; Dynamic loads; Oblique flow; Enhanced propeller-surface interaction; Regular head waves;

    机译：开放式螺旋桨;动态载荷;斜流动;增强的螺旋桨表面相互作用;常规头部波浪;

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