中国舰船研究2017，Vol.12Issue(6)：49-53,5.DOI:10.3969/j.issn.1673-3185.2017.06.008
轴对称直喷管的水下射流噪声特性数值模拟与实验验证
Numerical simulation and experimental validation of characteristics of jet noise from submerged axisymmetric nozzle
邢军华 1尚大晶 2张成 1苗天丞1
作者信息
- 1. 中国舰船研究设计中心船舶振动噪声重点实验室,湖北武汉430064
- 2. 哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001
- 折叠
摘要
Abstract
[Objectives] In order to study the underwater jet noise characteristics,[Methods]the Lighthill acoustic analogy is carried out to compute the underwater free jet flow sound field characteristic of axisymmetric nozzle,with applying of FLUENT simulation software and large eddy simulation,the real flow field of submerged axisymmetric nozzle is simulated, and the jet noise is measured by the reverberation method.[Results]The results show that the core length of steady flow field is independent of flow rate,and the length is about 8 times the diameter of the nozzle. The radiation power of jet noise is proportional to the velocity of eight times. The power spectrum of jet noise is different with the flow velocity in the low frequency. In the high frequency,the difference is significantly reduced. The radiated noise energy is mainly concentrated in the low frequency. With the increase of flow velocity, the main contribution of jet noise moves to high frequency.[Conclusions]In terms of computing simulation of jet noise,the large eddy simulation and Lighthill acoustic analogy combined analysis is an effective means.关键词
轴对称直喷管/射流噪声/混响法Key words
axisymmetric nozzle/jet noise/reverberation method分类
交通工程引用本文复制引用
邢军华,尚大晶,张成,苗天丞..轴对称直喷管的水下射流噪声特性数值模拟与实验验证[J].中国舰船研究,2017,12(6):49-53,5.
