摘要
该文利用FLUENT软件分别对流动介质中静止球体的流噪声和静止介质中运动球体的流噪声进行了仿真分析,比较两者的区别。计算结果表明:前一种状态的流噪声具有低频噪声的特点,并且流噪声总声压级的指向性具有偶极子特征;后一种状态下的流噪声具有高频噪声的特点,流噪声总声压级的指向性具有单极子特征。此外,还比较了球体大小与运动速度对流噪声的影响,发现速度与球体直径的大小主要影响了流噪声总声压级的大小,对流噪声频谱结构的影响较小。
The flow noise of the static sphere in the flow medium and the moving sphere in the static medium are simulated by FLUENT software respectively,and the difference between them is compared.The results show that the flow noise in the former state has the characteristics of low frequency noise and the directivity of the total sound pressure level of the flow noise has dipole characteristics.The flow noise in the latter state has the characteristics of high frequency noise,and the directivity of the total sound pressure level of the flow noise has monopole characteristics.Finally,the influence of the sphere size and velocity on the flow noise is compared.It is found that the velocity and the sphere diameter mainly affect the total sound pressure level of the flow noise,while less affect the spectrum structure of the flow noise.
作者
李松
李学智
陈广智
张天宇
LI Song;LI Xue-zhi;CHEN Guang-zhi;ZHANG Tian-yu(Acoustic Science and Technology Laboratory,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;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2021年第5期717-727,共11页
Chinese Journal of Hydrodynamics
基金
水声技术重点实验室稳定支持项目
中央高校基本科研业务(3072021CFT00)。
关键词
球体绕流
流噪声
单极子
偶极子
Flow around a sphere
Flow noise
Monopole
Dipole
