船舶节能技术中，水动力节能装置得到了广泛应用。为进一步提高螺旋桨水动力性能，本文提出了一种新型环形自由旋转叶轮，安装于KP505螺旋桨后方，并深入分析了有无新型环形自由叶轮的螺旋桨在直航及斜流工况下的水动力性能和流场特性。基于STAR-CCM+软件，采用$ (\text{SST})k-\omega $湍流模型求解RANS方程进行模拟仿真以评估其性能。同时针对不同进速系数，开展了单桨与加装新型环形自由旋转叶轮螺旋桨的水动力性能预报和尾流场对比分析，并评判其节能效果。研究结果表明，加装新型环形自由叶轮的螺旋桨在设计进速时，推进效率最高提升6.59%；引入新型环形自由旋转叶轮显著削弱了尾流的能量耗散，尤其在斜流条件下，大幅降低了尾流的不稳定性，证实环形自由旋转叶轮对提升螺旋桨水动力性能具有一定的潜在优势。
Hydrodynamic energy saving device has been widely applied within ship energy-saving technologies. To enhance the hydrodynamic performance of the propeller, a new toroidal free-rotating impeller is proposed and installed behind the KP505 propeller, the hydrodynamic performance and flow characteristics of the propellers with and without the new device are thoroughly analyzed under both straight-ahead and oblique flow conditions. Using the STAR-CCM+ software, turbulent models $ (\text{SST})k-\omega $ are employed to solve the RANS equations for simulation and performance evaluation. To evaluate energy-saving effects simultaneously, hydrodynamic performance prediction and wake field comparison are conducted for propellers with/without the new device under different advance coefficients. The research results indicate that the propulsion efficiency of propeller with the new device is increased by up to 6.59% at the design advance coefficient; the new device significantly reduces the energy dissipation and instability of the wake flow, especially under oblique flow conditions. This confirms that the toroidal free-rotating impeller has potential advantages for improving the propeller hydrodynamic performance.
2026,48(5): 18-25 收稿日期：2025-7-2
DOI：10.3404/j.issn.1672-7649.2026.05.003
分类号：U664.3
基金项目：国家自然科学基金资助项目（52101315）；江苏海事职业技术学院科研启动基金项目（2025BSKY01）
作者简介：李冬琴(1979-),女,博士,教授,研究方向为新船型开发、船舶水动力性能优化
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