泵喷推进器导管内壁与转子叶梢之间存在较小的间隙 ，叶梢间隙中的流场是整个导管内流场中最复杂的区域。为了研究泵喷推进器梢隙流场特性，基于大涡模拟对泵喷推进器的梢隙流场进行数值模拟分析。通过对网格数量和时间步长的无关性验证，建立了一套研究梢隙流场特性的计算方法，分析了梢隙流场中涡结构的生成、输运和扩散过程，并对比了不同湍流模型和进速系数对梢隙流场中涡结构形态的影响。研究结果为控制泵喷推进器梢隙流场提供参考。
The flow field in the small gap between the inner wall of duct and blade tip of rotor of the pump-jet propeller is the most complicate region in the whole internal flow field of the duct. In this study, a numerical simulation on flow field in the tip gap of pump-jet propeller was carried out based on large eddy simulation in order to disclose characteristic of this flow field. Moreover, a computing method for flow field characteristic in the tip gap was set up through a verification of irrelevance between the grid number and time step. The formation, transmission and diffusion processes of vortex structures in the flow field were analyzed. Additionally, effects of turbulence models and advance coefficient on the vortex structural morphology in the flow field were compared. Research conclusion can provide references to control flow field in the tip gap of pump-jet propeller.
2022,44(6): 95-101 收稿日期：2021-01-12
DOI：10.3404/j.issn.1672-7649.2022.06.020
分类号：U671.91+1
基金项目：国家自然科学基金资助项目（51579243）
作者简介：孙大鹏(1995-)，男，硕士研究生，研究方向为舰船水动力性能
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