文献类型： 外文期刊
作者： Yu, Duo 1 ; Wang, Liang 1 ; Liu, Haitian 1 ; Cui, Mingchao 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Key Lab Fishery Equipment & Engn, Minist Agr & Rural Affairs, Shanghai 200092, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China
关键词： LES; numerical research; propeller wake; pairing process
期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.9； 五年影响因子：2.9 ）
ISSN：
年卷期： 2023 年 11 卷 9 期
页码：
收录情况： SCI
摘要： The present work presents numerical research on the wake flows behind a propeller operating under three advance coefficients. Large eddy simulations are adopted to obtain the viscous flow information behind the propeller. In particular, the study highlights the comparison of the evolution characteristics and the flow physics within the propeller wakes with three advance coefficients. The predicted global force and moment coefficients and phase-average statistics of streamwise velocity agree well with the available experimental data. Compared to all other flow structures in the wake, the tip vortices are found to play the most significant role according to the results. During the pairing process of adjacent tip vortices, the tip vortices diffuse circumferentially, leading to enhanced mutual-induction effects. When the advance coefficient is low, the wake becomes distorted, and the pairing process takes place in the middle region of the flow field. As a result of their unstable motion, the four tip vortices generated by the propeller cannot be distinguished individually in the far field. Instead, they break down into smaller vortices and tend to distribute themselves uniformly in the azimuthal direction. The increase in the advance coefficient delays the pairing process. This study offers valuable insights for the design and optimization of marine propellers.
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