Investigating the Hydro-acoustic behaviour and noise of marine propellers is very important, especially in underwater vessels and submarines. The present study aims to numerically model the hydrodynamic noise of a benchmark marine propeller using the computational fluid dynamics method based on the finite volume method under open water conditions. The DES turbulence model is used in the numerical simulation, which is a good model for modelling small eddies near the wall and covers the advantages of both LES and RANS models. To increase the accuracy of the numerical solution, a finer grid has been used on the blades tips, hub, and boss. According to the investigations, time step independence occurs for 0.001 s. In the following, the numerical analysis of the hydrodynamic noise of the DTMB4119 propeller has been extracted at the advance coefficients of 0.5–1.1 and distances of 1D to 10D from the propeller in the axial directions and perpendicular to the fluid flow. Based on the obtained results, the highest level of noise emission in the flow direction is related to low frequencies, and with the increase in frequency and distance from the noise source, the emitted noise level decreases. Increasing the distance from the noise source from 1D to 10D decreases the emitted noise level by 40 dB. For every 0.1 reduction in the advance coefficient, 10 dB is added to the noise emission level in the axial direction.

研究船用螺旋桨的水声行为和噪声非常重要，特别是在水下船舶和潜艇中。本研究旨在利用基于有限体积法的计算流体动力学方法，在开放水域条件下对基准船用螺旋桨的水动力噪声进行数值模拟。数值模拟采用DES湍流模型，它是模拟近壁小涡流的良好模型，涵盖了LES和RANS模型的优点。为了提高数值解的准确性，在叶片尖端、轮毂和凸台上使用了更精细的网格。根据调查，时间步独立性发生时间为 0.001 s。在下面的，DTMB4119 螺旋桨的水动力噪声的数值分析是在进速系数为 0.5-1.1 以及在轴向和垂直于流体流动方向距螺旋桨 1D 至 10D 的距离下提取的。根据所得结果，流动方向的最高噪声排放水平与低频有关，并且随着频率的增加和距噪声源距离的增加，排放的噪声水平降低。将与噪声源的距离从 1D 增加到 10D 可使发射的噪声水平降低 40 dB。提前系数每减少 0.1，轴向噪声排放水平就会增加 10 dB。流动方向噪声发射的最高水平与低频有关，并且随着频率的增加和距噪声源距离的增加，发射的噪声水平降低。将与噪声源的距离从 1D 增加到 10D 可使发射的噪声水平降低 40 dB。提前系数每减少 0.1，轴向噪声排放水平就会增加 10 dB。流动方向噪声发射的最高水平与低频有关，并且随着频率的增加和距噪声源距离的增加，发射的噪声水平降低。将与噪声源的距离从 1D 增加到 10D 可使发射的噪声水平降低 40 dB。提前系数每减少 0.1，轴向噪声排放水平就会增加 10 dB。