Dynamic hysteresis process in tip vortex cavitation

被引：2
|
作者：
Jiang, Jing-Wei [1 ]
Xie, Chun-Mei [2 ]
Wu, Da-Zhuan [3 ,4 ]
Qian, Zheng-Fang [5 ]
Li, Liang [2 ,6 ]
Xu, Liang-Hao [2 ]
Huang, Wei-Xi [1 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[2] China Ship Sci Res Ctr, Wuxi 214082, Jiangsu, Peoples R China
[3] Zhejiang Univ, Coll Energy Engn, Hangzhou 310027, Peoples R China
[4] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China
[5] Naval Res Inst PLA, Beijing, Peoples R China
[6] Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Peoples R China
来源：
PHYSICS OF FLUIDS | 2024年 / 36卷 / 02期
基金：
中国国家自然科学基金;
关键词：
In this Letter; experiments are conducted on tip vortex cavitation (TVC) over a stationary elliptical hydrofoil with the cross section of NACA (National Advisory Committee for Aeronautics) 66 2 − 415 in a water tunnel. The state of TVC at various cavitation numbers; inflow velocities; and angles of attack is tested. Several macroscopic phase transition processes of TVC are discovered within the hysteresis loop with the operating conditions unchanged; and these new phenomena are defined as the dynamic hysteresis (DH) processes. In addition; the noise characteristics are analyzed to further study the DH. Similar noise spectra are obtained for the DH processes under different working conditions; with a major peak of the same frequency regardless of whether vortex singing occurs or not. © 2024 Author(s);
D O I：
10.1063/5.0190051
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this Letter, experiments are conducted on tip vortex cavitation (TVC) over a stationary elliptical hydrofoil with the cross section of NACA (National Advisory Committee for Aeronautics) 66 2 - 415 in a water tunnel. The state of TVC at various cavitation numbers, inflow velocities, and angles of attack is tested. Several macroscopic phase transition processes of TVC are discovered within the hysteresis loop with the operating conditions unchanged, and these new phenomena are defined as the dynamic hysteresis (DH) processes. In addition, the noise characteristics are analyzed to further study the DH. Similar noise spectra are obtained for the DH processes under different working conditions, with a major peak of the same frequency regardless of whether vortex singing occurs or not.
引用
收藏
页数：5
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