In this paper, the flow field around NACA0015 hydrofoil is calculated under the condition of two-phase cavitating flow to provide a theoretical guidance for reducing the cavitation noise. A modified turbulence model coupled with the Zwart cavitation model is used to calculate the flow field. According to the computed sound source data, the dipole sound pressure distribution diagrams for the extremely short time and the complete time around the hydrofoil under different working conditions are obtained. The sound pressure distribution and the sound pressure amplitude are analyzed in detail. In addition, the field points around the hydrofoil are selected to generate the corresponding frequency response function curves, which are analyzed from the aspects of the trend, the variation and the extreme value. The results show that the dipole characteristics are gradually diminished and finally disappear with the increase of the frequency. At the frequency of the vapor volume fraction fluctuation, the noise level at the field point will have an extreme value.

本文以两相空化流为条件，计算了NACA0015水翼周围的流场，为减小空化噪声提供了理论指导。修改后的湍流模型与Zwart空化模型一起用于计算流场。根据计算得到的声源数据，得到不同工况下水翼周围极短时间和整个时间的偶极声压分布图。详细分析了声压分布和声压振幅。此外，选择水翼周围的场点以生成相应的频率响应函数曲线，并从趋势，变化和极值方面进行分析。结果表明，随着频率的增加，偶极子特性逐渐减小，最终消失。在蒸气体积分数波动的频率下，场点处的噪声水平将具有极值。