摘要
利用大涡模拟计算出潜艇的非稳态流场,采用Curle方程对非稳态流场中的流噪声进行提取。计算结果表明:在艇艏方向上噪声辐射强度最大,艇艉方向上最小,且艇艏和艇艉方向具有不同的频谱特性。仿真还给出了不同潜艇不同部位噪声辐射强度达到峰值处的频率特性。
This paper uses large eddy simulation （LES） to compute the unsteady flow field of a sub- marine and then applies Curle＇s equation to the extraction of the hydrodynamic noise from the un- steady flow field according to the calculated result of LES. The simulation shows that the noise radia- tion is the strongest in the direction of the how while the radiation is the lowest in the direction of the stern and that there are different spectral characteristics in either direction. Also, the simulation of- fers the frequencies at which the noise radiation from a different part of the submarine reaches the peak value.
出处
《海军工程大学学报》
CAS
北大核心
2013年第6期64-68,共5页
Journal of Naval University of Engineering
基金
国家部委基金资助项目(1010502010101)
关键词
潜艇
流噪声
大涡模拟
submarine
hydrodynamic noise
large eddy simulation
