- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | CHEN Qian, ZHAO Xiaojun, WANG Yiwen, MENG Fanxin, CHEN Yue, ZHOU Xiaonan, WU Qin. Numerical Investigation of Flow-Induced Vibration Characteristics Under Typical Cavitation Conditions Around Hydrofoil[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250198
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To investigate the unsteady fluid-structure interaction (FSI) characteristics of the NACA66 hydrofoil during typical cavitation stages, its hydrodynamic and flow-induced vibration characteristics were numerically calculated using an unsteady cavitating FSI model. First, an unsteady cavitating FSI numerical model was established, and the calculated results were compared with the experimental results reported by Wu et al. to verify the accuracy of the model. Second, the characteristics of typical cavitation flow pattern distributions and the evolution of the unsteady flow-field structure were analyzed using the numerical method. Finally, the hydrodynamic and flow-induced vibration characteristics during different typical cavitation stages were further investigated. The results show that, during typical cavitation stages, the maximum cavity length increases as the cavitation number decreases, and cloud cavitation exhibits pronounced periodicity. The lift and drag coefficients vary with the cavitation number. The maximum tip vibration displacement and velocity of the hydrofoil remain relatively high during incipient cavitation but remain low during supercavitation due to the effect of full cavity coverage. During cloud cavitation, the maximum vibration displacement and velocity exhibit substantial periodic fluctuations due to unsteady flow effects. The maximum tip displacement and maximum tip torsion angle of the hydrofoil are linearly related to the lift and pitching moment, respectively. In addition, the flow-induced vibration frequency of the hydrofoil is approximately equal to the cavitation shedding frequency, and the vibration frequency decreases as the cavitation number decreases.
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