Tip vortex control effect and open-water performance of grooves in a pumpjet propulsor

被引：0
|
作者：
Sun D. [1 ]
Ye J. [1 ]
Zou X. [1 ]
Wu Y. [1 ]
Shi B. [2 ]
机构：
[1] College of Ship and Ocean, Naval University of Engineering, Wuhan
[2] No. 91697 Troops of PLA, Qingdao
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 04期
关键词：
cavitation; groove structure; open-water performance; pumpjet propulsor; separate vortex simulations; structured mesh; tip clearance flow field; tip vortex;
D O I：
10.11990/jheu.202110057
中图分类号：
学科分类号：
摘要：
To control the flow field of tip clearance in a pumpjet propulsor and suppress tip vortex cavitation, a certain number of grooves were set in the inner wall of the duct of a pumpjet propulsor. Based on the detached eddy simulation method and high-quality structured grid, a numerical calculation of the tip clearance flow field of the pumpjet propulsor was performed, and an open-water performance test of the pumpjet propulsor based on a towing tank was designed and performed. The effects of groove structure on the shape of the tip vortex, tip vortex core pressure, and open-water performance were compared and analyzed. The results show that the groove structure can substantially increase the core pressure of the tip vortex, the mean value of the relative pressure of the vortex core can be increased by at least 36. 57%, and the volume of the low-pressure region of the tip vortex behind the rotor trailing edge can be reduced by 65. 8%, which can effectively delay the tip vortex cavitation. In addition, the groove structure has little impact on the hydrodynamic performance of the pumpjet propulsor and can improve the propulsion efficiency to a certain extent. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：538 / 545
页数：7
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