Numerical Simulation of Flow-Induced Vibration of a Symmetrical Hydrofoil Based on Overset Grid

被引：0
作者：
Yao Z. [1 ,2 ]
Zou S. [1 ]
Zeng Y. [3 ]
Liu B. [1 ]
Zhang J. [1 ]
机构：
[1] College of Water Resources & Civil Engineering, China Agricultural University, Beijing
[2] Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing
[3] Department of Energy and Power Engineering, Tsinghua University, Beijing
来源：
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2023年 / 43卷 / 09期
关键词：
hydrofoil; lock-in; overset grid; vibration amplitude; vortex-induced vibration;
D O I：
10.15918/j.tbit1001-0645.2022.229
中图分类号：
学科分类号：
摘要：
For lock-in condition, the amplitude of vortex-induced vibration on the hydro-mechanical blade/guide vane increases sharply, which can reach 100 times higher than in lock-off condition. Taking symmetric hydrofoils as the research object, numerical simulation of flow-induced vibration under lock-in and lock-off conditions was carried out based on the separated bidirectional fluid-structure interaction and overset grid. The results show that in lock-in condition, the hydrofoil showed a torsional mode shape, and the vortex shedding in the wake area fell off in parallel with the same phase along the direction of the spread; in lock-off condition, the hydrofoil vibrated in the form of beat frequency. The predicted relative difference in the vibration amplitude of the hydrofoil in lock-in and lock-off conditions is basically consistent with the experimental data, which can provide guidance for the evaluation of vibration characteristics under large deformation conditions. © 2023 Beijing Institute of Technology. All rights reserved.
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页码：885 / 894
页数：9
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