【作者】 杨秀庭； 孙贵青； 李敏； 李启虎；

【Author】 YANG Xiu-ting~(1,2) SUN Gui-qing~1 LI Min~1 LI Qi-hu~1 (1.Institute of Acoustics,the Chinese Academy of Sciences,Beijing 100080,China 2.PLA Naval Academy,Dalian 116018,China)

【机构】 中国科学院声学研究所；

【摘要】 研究矢量拖曳式线列阵声呐护套管内的流噪声场。根据湍流边界层脉动压力谱的 Corcos 模型,采用频率- 波数域上的二维谱方法,分析了流噪声对矢量拖曳式线列阵声呐的影响。给出了护套管内流噪声场声压和质点声振速的一般表达式,并由波数积分法得到护套管内点接收器、有限几何尺寸水听器和水听器阵列输出的流噪声各分量的功率谱。数值结果表明,矢量拖曳式线列阵声呐对流噪声的轴向分量十分敏感,在流噪声控制背景下,矢量阵的工作性能将退化为常规阵。更多还原

【Abstract】 Flow noise in the interior fluid of a vector hydrophone towed linear array is analyzed.Follow- ing Corcos’s model which describes the cross spectrum of the turbulent boundary layer pressure fluctu- ations,a method in the frequency-wave number field spectrum is applied to analyze the influence of flow noise.General mathematic forms of acoustic pressure and particle velocity in the flow noise field are given with regard to the excitation of the cable jacket.Furthermore,power spectrum of flow noise is calculated for point hydrophone,finite hydrophone and hydrophone array.Numerical results show that performance of the vector hydrophone towed linear army is very sensitive to the axial component of flow noise,and it will degrade to the conventional array in a flow noise controlled background.更多还原