典型突出体水动力噪声特性与控制技术研究  

Generation property of hydrodynamic noise from the typical protrusion and noise control technique

作　　者：刘永伟 郑朋辉[1,2,3] 周文林 商德江 LIU Yong-wei;ZHENG Peng-hui;ZHOU Wen-lin;SHANG De-jiang(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;Hangzhou Applied Acoustics Research Institute,Hangzhou 310023,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]哈尔滨工程大学水声工程学院,哈尔滨150001 [3]工业和信息化部海洋信息获取与安全工信部重点实验室(哈尔滨工程大学),哈尔滨150001 [4]杭州应用声学研究所,杭州310023

出　　处：《船舶力学》2024年第5期771-786,共16页Journal of Ship Mechanics

基　　金：黑龙江省自然科学基金资助项目(JJ2019LH1082);水声技术重点实验室基金资助项目(6142108011305)。

摘　　要：水下航行器利用外部突出体通过流动压力差进行自流冷却,可很好地避免水泵激励排水管路产生的低频线谱噪声,但突出体作为外部凸体产生的噪声会影响水下航行器的声隐身性能。针对矩形入口和圆形入口两种突出体模型,开展流场与声场的数值计算,分析不同流速条件下两种突出体水动力噪声的产生特性,发现矩形入口突出体比圆形入口突出体的辐射噪声小。为进一步降低噪声,采用锯齿结构对矩形入口突出体进行流动控制,发现在矩形入口前缘添加锯齿的降噪效果优于在尾缘添加锯齿,并归纳了具有最佳降噪效果的锯齿参数。为验证数值计算结果,分别加工了四种突出体模型,并在重力式低噪声水洞中开展试验测试。结果表明,采用锯齿优化的矩形入口突出体,在10~2000 Hz范围内有较好的降噪效果。上述研究成果可为水下航行器突出体的低噪声设计提供参考。The cooling system can be carried out by the flow pressure difference through the outside protru⁃sion of an underwater vehicle.This system can prevent the low line frequency pipe noise from the pump’s ex⁃citation.However,the protrusion is external,generating the hydrodynamic noise and destroying the acoustic stealth of underwater vehicles.Two protrusion models with a rectangular inlet and a circular inlet were creat⁃ed.The flow field and sound field were numerically calculated.The generation property of the hydrodynamic noise from the two protrusions on the condition of different flow velocities was analyzed.It is indicated that the total radiated sound power of the protrusion with the rectangular inlet is slightly lower than that with the circular inlet.To further reduce the hydrodynamic noise,the protrusion with the rectangular inlet was carried out by the flow control through the serrations.The noise reduction effect of the protrusion with the rectangular inlet by the leading-edge serrations is better than that by the tail-edge serrations.The optimized parameters of the serrations were summarized.To validate the numerical calculation results,four protrusion models were designed and fabricated,and the experimental tests were done in the gravity low-noise water tunnel.The re⁃sults show that the protrusion with the rectangular inlet by the serrations optimization has a better noise re⁃duction effect in the frequency range from 10 Hz to 2000 Hz.The results in this paper can provide some refer⁃ences for the low-noise design of protrusions of underwater vehicles.

关 键 词：突出体 水动力噪声 流动控制 锯齿结构 

分 类 号：TB566[交通运输工程—水声工程]