Numerical simulation of unsteady cavitating flow on hydrofoil

被引：2
|
作者：
Hao Z.-R. [1 ]
Wang L.-Q. [1 ]
Wu D.-Z. [1 ]
机构：
[1] Institute of Chemical Machinery and Process Equipment, Zhejiang University
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2010年 / 44卷 / 05期
关键词：
Cavitation; Hydrofoil; Numerical simulation; Re-entrant jet;
D O I：
10.3785/j.issn.1008-973X.2010.05.035
中图分类号：
学科分类号：
摘要：
The unsteady cavitating flow around an NACA0015 hydrofoil at an angle of attack of 8° was simulated by a modified RNG k-ε turbulence model with two different cavitation numbers of 1 and 1.5, and the Reynolds number of 3 × 105. The structure of unsteady cavitating flow was obtained and so were the flow characteristics of its evolution process. Results show that the re-entrant jet plays an important role in the initiation and development process of cavity. The cavity first appears in the leading edge. Then the clockwise vortex developed in the same location moves to downstream along the surface of hydrofoil. The cavity grows up gradually and sheds from the hydrofoil and the shedding locations are different according to the cavitation numbers. The initiation and development process of the cavity accompany the pressure fluctuation. The amplitude and the frequency of pressure fluctuation of cavitating flow with a large cavitation number are obviously greater than that with a smaller caviation number.
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页码：1043 / 1048
页数：5
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