泵喷推进器是一种推进效率高、抗空化能力强、噪声辐射低的船舶推进装置，多用于潜艇、鱼雷以及其它水下装备，对泵喷推进器的相关研究有着重要的实际意义。首先，泵喷推进器的水力性能是决定其能否满足工作需要的关键因素；其次，泵喷推进器的噪声特性直接影响着潜艇等军事装备的隐身性能。当前针对泵喷推进器的相关研究，多聚焦于其水力性能和噪声特性两个方面。 本文基于计算流体力学（CFD）方法对泵喷推进器在敞水中的定常水力性能和在艇后的非定常水力性能进行数值模拟。其中，定常计算采用雷诺平均（RANS）方法，得到泵喷推进器的敞水性能曲线，并对比不同的湍流模型对计算结果的影响；非定常计算则基于大涡模拟（LES）方法，分析艇后泵喷推进器非定常脉动力的时域和频域特性。接着将计算结果与实验数据进行对比，验证数值计算的合理性及正确性，进而对泵喷推进器的水力性能进行全面的分析和评价。 在流场CFD计算的基础上，本文采用声学边界元方法及扇声源理论对泵喷推进器噪声的产生与传播特性进行数值预测，分析泵喷推进器各部件噪声的频谱特性、空间指向性以及对整体噪声的贡献，最后将各部分噪声进行叠加，得到艇后泵喷推进器整体噪声的频谱特性及其空间分布情况，为后续进行泵喷推进器的降噪优化提供数据支撑，并助力相关领域的进一步深入研究。

Pump-jet propulsor is a kind of ship propulsion appliances with high propulsion efficiency, strong cavitation resistance and low noise radiation. Pump-jet propulsor is mainly used in submarine, torpedo and other underwater vehicles, the study of pump-jet propulsor is significant. On the one hand, the hydraulic performance of pump-jet propulsor is the key factor to determine whether it can meet the work requirements; On the other hand, the noise characteristics of pump-jet propulsor directly affect the stealth performance of submarine and other military equipment. Therefore, the research of pump-jet propulsor mainly focuses on its hydraulic performance and noise characteristics. In this paper, computational fluid dynamics (CFD) method is used to simulate the steady hydraulic performance of pump-jet propulsor in open water and the unsteady hydraulic performance behind the submarine. The Reynolds Average N-S (RANS) equation was used to obtain the open water performance curves of the pump-jet propulsor, and the effects of different turbulence models on the calculation results were compared. The time-domain and frequency-domain characteristics of unsteady force of the pump jet propulsor behind the submarine are obtained based on Large Eddy Simulation (LES) method. Then the calculation results were compared with the experimental data to verify the rationality and accuracy of the numerical simulation, so that the hydraulic performance of the pump-jet propulsor was comprehensively analyzed and evaluated. On the basis of the flow field calculated by CFD, numerical prediction on the noise generation and propagation characteristics of the pump-jet propulsor was made by using acoustic boundary element method and fan sound source theory, and the spectral characteristics, spatial directivity and contribution to the total noise of each component of the pump-jet propulsor were analyzed. Finally, the noise of each component was superimposed to obtain the total noise spectrum characteristics and spatial distribution of the pump-jet propulsor, which will provide a basis for the noise reduction optimization of the pump-jet propulsor and help further research in related fields.