Abstract: A mixed-flow pump equipped on a high-speed ship has been studied by using the Reynolds-Averaged Navier-Stokes (RANS) method combined with the Lighthill acoustic analogy equation based on the STAR-CCM+ software. The jet wake field and the noise characteristics corresponding to different immersion depths are studied by adjusting the ship draught. The numerical simulation method of the integrated flow field of the ship and pump and the noise calculation method of the jet wake field are established for the mooring condition. The influence of the jet immersion depth on the wake is investigated by the simulation of the flow field. It is concluded that the underwater jet has less energy dissipation and weaker wake flow characteristics than the surface jet, and reduced hydrodynamic noise with the increase of the immersion depth after complete immersion. It can provide significant references for the development of the water-jet propulsion and even the comprehensive ship stealth technology.

Key words: water-jet propulsion, numerical simulation, jet flow wake, wake noise

摘要： 应用STAR-CCM+软件,结合RANS方法并引入Lighthill声类比方程,针对某高速艇配备的混流式推进泵,调节船舶吃水深度,研究不同浸没深度的喷射流尾迹场及其噪声特性。文中建立了系泊状态下船泵一体化流场数值模拟方法及喷射流尾迹场噪声计算方法,通过流场模拟掌握了喷射流浸没深度对尾迹的影响规律,得到水下喷射比水面喷射能量耗散较少、尾迹流动特征较弱和完全浸没后水动力噪声随着浸没深度增加而变小等重要结论,对发展喷水推进乃至船舶综合隐身技术均有重要指导意义。

关键词: 喷水推进, 数值模拟, 喷射流尾迹, 尾迹场噪声