为探究不同桨叶梢部形状对导管桨梢隙流动及水动力性能的影响，本文基于大涡模拟方法对宽叶梢形导管桨和圆弧形叶梢导管桨进行数值模拟。通过对计算网格无关性分析以及对Ka4-70导管桨敞水性能计算结果与试验结果的对比，验证数值计算方法的有效性。在此基础上，计算分析2种不同桨叶梢部形状的导管桨梢隙流动、水动力性能、空泡起始性能以及导管脉动压力之间的差异。结果表明，与圆弧形叶梢导管桨相比，宽叶梢形导管桨的梢隙流动结构更为复杂，推进效率较低，导管脉动压力较大，但梢泄涡强度较弱，空泡起始性能较好。
To investigate the effects of blade tip profile on tip clearance flow and hydrodynamic performance of ducted propeller, a numerical method of large eddy simulation was used in this paper for the study of two ducted propellers with wide blade tip profile and rounded blade tip profile. Four sets of grids with different grid density were used to conduct grid convergence and the effectiveness of the numerical method is verified by comparing the computational hydrodynamic results of Ka4-70 ducted propeller with the experimental data. After that, tip clearance flow, hydrodynamic performance, tip vortex cavitation inception and duct pressure fluctuation of ducted propellers with two blade tip profiles were calculated and analyzed. The results show that the vortex structure of the tip clearance flow of the ducted propeller with wide blade tip profile is more complex, the propulsion efficiency is lower, the amplitude of fluctuating pressure on duct inner surface is larger, while the strength of the tip-leakage vortex is weaker and the tip vortex cavitation inception performance is better.
2025,47(24): 16-22 收稿日期：2024-12-6
DOI：10.3404/j.issn.1672-7649.2025.24.003
分类号：U664.33
基金项目：2022年度科技部重点研发计划“高性能制造技术与重大装备”重点专项资助项目（2022YFB3404800）
作者简介：戎智(2000-),男,硕士研究生,研究方向为流体力学
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