后置定子泵喷推进器噪声辐射特性分析  

An analysis of noise radiation characteristics of pumpjet propulsor with rear stator

作　　者：杜通成 武建国[1] 韩光哲 张敏革[2,3] 武天龙 DU Tongcheng;WU Jianguo;HAN Guangzhe;ZHANG Minge;WU Tianlong(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;School of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300222,China;Tianjin Hanhai Lanfan Marine Technology Co.,Ltd.,Tianjin 300462,China)

机构地区：[1]河北工业大学机械工程学院,天津300401 [2]天津科技大学机械工程学院,天津300222 [3]天津瀚海蓝帆海洋科技有限公司,天津300462

出　　处：《哈尔滨工程大学学报》2024年第11期2185-2194,共10页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2020YFC1521704);天津市科技计划项目(22YDTPJC00470).

摘　　要：为了探究后置定子对泵喷推进器噪声的影响,本文利用杆-翼模型完成了噪声数值方法的验证,并基于分块结构性网格对研究模型进行了瞬态模拟。分析了后置定子对流场的影响,提取了模型周围若干监测点噪声数据,探究了其噪声辐射特性。结果表明:定子叶片增大了转子尾流的轴向速度,提高了推进器的推进性能;定子叶片还能够平衡转子产生的压力涡旋,均匀尾流压力;从整体声场指向性分布来看,在轴向方向转子噪声占据主导影响,在小范围的径向方向导管噪声对整体噪声影响较大,定子噪声对整体噪声影响最小;随着距离增加,声场中的低压区指向性由前缘120°和240°向中部收缩,最终整体呈现“∞”型;在轴向方向低频段噪声衰减最快,并且随着距离的增加,衰减速度越来越快,在径向方向上,低频段噪声衰减速度变化并不明显。To investigate the noise radiation characteristics of the rear stator pumpjet propulsor,a rod-airfoil model was used to verify the noise numerical method.A transient simulation of the research model was carried out using a block structured grid.This study analyzed the influence of the rear stator on the flow field,extracted noise data from several monitoring points around the model,and examined the noise radiation characteristics.The results show that the stator blades increase the axial velocity of the rotor wake,thereby improving the thruster′s propulsion performance.Furthermore,the stator blades balance the pressure vortex generated by the rotor,resulting in a uniform wake pressure distribution.In terms of the overall sound field directional distribution,rotor noise in the axial direction has the most significant impact,while duct noise in the small-scale radial direction also notably affects the overall noise.The stator noise contributes the least to the overall noise.As the distance from the source increases,the directivity of the low-pressure zone in the acoustic field narrows from 120°and 240°at the leading edge toward the center,eventually forming an“∞”shape overall.In the axial direction,low-frequency noise attenuates the fastest,and the attenuation rate increases with distance.Conversely,in the radial direction,the decay rate of lowfrequency noise changes is not significant.

关 键 词：泵喷推进器 后置定子 瞬态模拟 杆-翼噪声 改进的延迟分离涡模型 FW-H方程 噪声辐射 噪声衰减 

分 类 号：U664.34[交通运输工程—船舶及航道工程]