Flow noise originating in the turbulent boundary layer (TBL) often severely limits the performance of towed sonar array. Therefore, it is necessary to predict this noise for the design of an efficient towed array. This paper presents large eddy simulation methodology to establish the TBL properties and wall pressure fluctuations on a 12 m long towed array with length to diameter ratio of 1200 in the operating tow speed range of 2 to 5 knots in water. The computed flow noise levels are compared with experimental measurements available in the literature successfully. The effectiveness of scaling the flow noise spectra with the diameter and tow speed is discussed, and non-dimensional wall pressure spectra presented with respect to non-dimensional frequency. The overall sound pressure levels are also compared with experimental data that show good accuracy achieved by the proposed numerical methodology.

源自湍流边界层（TBL）的流动噪声通常会严重限制拖曳声纳阵列的性能。因此，对于设计有效的拖曳阵列，有必要预测这种噪声。本文提出了大型涡流模拟方法，以在水拖曳速度为2至5节的情况下，在长径比为1200的12 m长拖曳阵列上建立TBL特性和壁压力波动。成功地将计算出的流噪声水平与文献中提供的实验测量结果进行了比较。讨论了按直径和拖曳速度缩放流噪声谱的有效性，并针对无量纲频率提出了无量纲壁压力频谱。