中国舰船研究Issue(4)：29-38,10.DOI:10.3969/j.issn.1673-3185.2015.04.005
水下航行器水动力噪声分离预报
Separating prediction of the hydrodynamic noise of an underwater vehicle
摘要
Abstract
In recent years,acoustic stealthiness,being one of the most important parameters to evaluate un⁃derwater vehicles' operational performance,has received widespread attention. However,the hydrodynamic noise of underwater vehicles has seldom been studied. In this paper,hydrodynamic noise is classified into four categories:the flow-induced noise of the shell,the noise of flow excited-vibration of the shell,the flow induced-noise of the propeller,and the noise of flow excited-vibration of the propeller,all of which are pre⁃dicted by using the Large Eddy Simulation (LES) and the Lighthill's acoustic analogy method. Firstly,the ef⁃fectiveness of these hybrid acoustic simulation methods is verified with present research results. Then,the simulation of four noise types is conducted,where the analysis is made respectively by sound power level, sound pressure level contours,and total sound pressure levels. It is seen that the relations between the four types and the relevant speed are all non-linear. Specifically,the major noise in the upstream is that from the flow-induced vibration of propellers,while the major noise in the downstream is the flow-induced noise of shells. Furthermore,the hydrodynamic noise induced by the shell is the major noise at low speed,and the hydrodynamic noise induced by the propellers gradually increases with the increase of speed.关键词
水下航行器/大涡模拟/Lighthill声类比/水动力噪声/流噪声/流激振动噪声Key words
underwater vehicle/Large Eddy Simulation (LES)/Lighthill's acoustic analogy/hydrodynam-ic noise/flow-induced noise/noise from the flow-induced vibration分类
交通工程引用本文复制引用
王康,刘国庆,王强,张咏鸥,李旭..水下航行器水动力噪声分离预报[J].中国舰船研究,2015,(4):29-38,10.基金项目
国家留学基金委资助项目（201406160032）；华中科技大学国防自主创新研究基金资助项目 （）
