PIV measurement of cavitating flow around a pitching hydrofoil

Mengjie Zhang*, Jie Chen, Zhongyi Xu, Xinjian Ruan, Biao Huang

*此作品的通讯作者

科研成果: 期刊稿件会议文章同行评审

摘要

Particle Image Velocimetry (PIV) and hydrodynamic measurements were applied to investigate the cavitating flow of a pitching hydrofoil in the form of triangular wave motion (mean incidence α 0=10°, amplitude Δα=5° and pitching frequency f∗=2Hz). The Reynolds number is Re=4.5×105. The cavitation number is set to σ=2.3, 1.36. Different typical cavity patterns are observed by PIV images in the whole pitching period, including sub cavitation, inception cavitation, sheet cavitation and cloud cavitation. As the σ decreases, the cavity area increases. And the the corresponding time and position of cavitation patterns also changed significantly. In the instantaneous velocity field of an oscillating hydrofoil, the low velocity zone (LVZ) and the mainstream zone (MZ) are observed. The LVZ corresponds to the cavitation region and changes with the change of cavitation morphology. Meanwhile, the LVZ has a large velocity gradient. The velocity gradient in the MZ is larger along the direction parallel to the incoming flow, and the velocity tends to increase first and then decrease gradually downstream. With the decrease of cavitation number, the area of LVZ increases. And the distribution of LVZ is more uneven, which is mainly caused by oscillation motion and uneven water vapor mixing.

源语言英语
文章编号012137
期刊Journal of Physics: Conference Series
2707
1
DOI
出版状态已出版 - 2024
活动17th Asian International Conference on Fluid Machinery, AICFM 2023 - Zhenjiang, 中国
期限: 20 10月 202323 10月 2023

指纹

探究 'PIV measurement of cavitating flow around a pitching hydrofoil' 的科研主题。它们共同构成独一无二的指纹。

引用此

Zhang, M., Chen, J., Xu, Z., Ruan, X., & Huang, B. (2024). PIV measurement of cavitating flow around a pitching hydrofoil. Journal of Physics: Conference Series, 2707(1), 文章 012137. https://doi.org/10.1088/1742-6596/2707/1/012137