The sound detection ability of small underwater vehicle can be increased by use of flank array. Flow noise,which source is the turbulent boundary pressure fluctuation on the array surface,is a main ambient noise of small scale underwater vehicle flank array. The receive performance of the small scale flank array can be increased by reduction of flow noise. In this paper, the calculation method of flow noise is obtained by modeling of the wavenumber response of the small scale underwater vehicle flank array. It is shown from simulation results that, the flow noise of the small scale underwater vehicle flank array can be effectively decreased by use of large area hydrophone and viscous elastic layer to filter out the high wavenumber component of turbulent boundary pressure fluctuation.%在小型水下航行器上加装舷侧阵,可有效增大基阵孔径,提高探测能力.流噪声是小型水下航行器舷侧阵的主要背景噪声之一,其激励源为阵表面的湍流边界层起伏压力.抑制流噪声是提高小型水下航行器舷侧阵声接收性能的重要途径.本文通过小型水下航行器舷侧阵的波数域响应函数建模给出了流噪声计算方法.仿真分析结果表明,采用面元水听器和表面覆盖粘弹性层相结合,可滤除湍流边界层起伏压力的高波数成份,从而有效抑制小型水下航行器舷侧阵的流噪声.
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