哈尔滨工程大学学报Issue(1)：57-61,5.DOI:10.3969/j.issn.1006-7043.201310011
矢量拖曳线列阵流噪声时-空相关特性研究
Research on the temporal-spatial correlation of the flow-induced noise in the application of towed linear array
摘要
Abstract
In order to depress the flow⁃induced noise of vector towed linear array, improve its performance, it is necessary to study the distribution of the flow noise field. Following the Carpenter model that is based on the turbu⁃lent boundary layer ( TBL) of a long, thin cylinder, the general mathematical expressions of the acoustic pressure of the flow⁃induced noise of a cylindrical vector hydrophone in towered line array sheath, the axial particle velocity, and their temporal⁃spatial correlation matrix are derived. The spatial correlation of the flow noise is then calculated by numerical integration. The numerical calculation results showed that within the tens of centimeter range of the ax⁃ial correlation radius of narrowband flow noise, the flow noise received by vector hydrophone’ s elements of towed linear array based on half wavelength is approximately uncorrelated in the axial direction. It also showed that the frequency and radial position have great influences on the radial spatial correlations of narrowband flow noise. The pressure and axial particle velocity of wideband flow noise are approximately uncorrelated, thereby providing a theo⁃retical basis for suppressing the flow noise through the post signal processing algorithm.关键词
矢量水听器/拖曳线列阵/流噪声/自功率谱/相关性/压力起伏/Carpenter模型Key words
vector hydrophone/towed linear array/flow-induced noise/power spectrum/spatial correlation/pres-sure fluctuation/Carpenter model分类
通用工业技术引用本文复制引用
马根卯,时胜国,于树华..矢量拖曳线列阵流噪声时-空相关特性研究[J].哈尔滨工程大学学报,2015,(1):57-61,5.基金项目
水声技术重点实验室基金资助项目（9140C2002021001）． （）
