Cavitation noise around propellers has many adverse effects. It is still very limited nowadays to inhibit propeller cavitation noise in engineering. In this study, the cavitation noise around a PPTC propeller is simulated using the large eddy simulation (LES) coupled with the porous Ffowcs Williams-Hawkings (PFW-H) equation. The investigation aims to find a strategy to suppress cavitation noise and analyze the noise suppression mechanism. The predicted hydrodynamic results agree well with the experimental data and are utilized in the hydroacoustic analysis. The hydroacoustic results indicate that the pseudo-thickness noise dominates the dominant frequency component of the total cavitation noise due to the effect of cavity evolution, which is one of the reasons why the pseudo-thickness noise dominates the total cavitation noise. A method is found to weaken the cavitation noise through ventilation at the generation location of the sheet cavity (SC). It is worth noting that ventilation inhibits the generation and development of SC by changing the pressure distribution on the suction surface of the blade and pushing away the cavities around the ventilation holes. Moreover, cavity evolution noise dominates the fluid volume evolution noise under the ventilated cavitating condition. Ventilation significantly attenuates the vapor volume pulsation and thus the cavity evolution noise, which leads to a reduction in pseudo-thickness noise and total cavitation noise. The ventilation mainly reduces noises at the dominant frequency of the pseudo-thickness noise and the total cavitation noise.

螺旋桨周围的空化噪声会产生许多不利影响。目前工程上抑制螺旋桨空泡噪声的作用还很有限。在本研究中，使用大涡模拟 (LES) 与多孔 Ffowcs Williams-Hawkings (PFW-H) 方程相结合来模拟 PPTC 螺旋桨周围的空化噪声。本研究旨在寻找抑制空化噪声的策略并分析噪声抑制机制。预测的水动力结果与实验数据非常吻合，并用于水声分析。水声结果表明，由于空穴演化的影响，赝厚噪声在总空化噪声中占主导地位，这也是赝厚噪声在总空化噪声中占主导地位的原因之一。找到了一种通过在片材空腔（SC）产生位置通风来减弱空化噪声的方法。值得注意的是，通风是通过改变叶片吸力面的压力分布、推开通风孔周围的空洞来抑制SC的产生和发展。此外，在通风空化条件下，空腔演化噪声在流体体积演化噪声中占主导地位。通风显着减弱了蒸汽量脉动，从而减弱了空穴演变噪声，从而减少了伪厚度噪声和总空化噪声。通风主要降低拟厚度噪声和总空化噪声的主频噪声。