The effects of the geometrical parameters on the hydroacoustic characteristics of the flow over rectangular, square and circular cylinders are investigated by numerical analyses and experiments. The numerical simulations are carried out by using a hybrid method which combines RANS with FWH equation. In order to validate the numerical results, the hydroacoustic measurements are also performed for the circular cylinders. The circular cylinders with diameters of 9.5, 19.0, 38.0 and 65.0 mm and aspect ratios of 2.5, 5.0 and 10.0 are employed for the hydroacoustic measurements and analyses. The rectangular cylinders with side ratios of 0.3, 0.6, 1.8 and 3.0, and also square cylinder with the side ratio of 1.0 are considered in hydroacoustic analyses. The Reynolds numbers are in the range of 2.25 × 10⁴ and 1.7 × 10⁵. The hydroacoustic characteristics of the cylinders are obtained to be completely different due to the differences in the shear layer separation, reattachment mechanism and the intensity of disturbance. The shape of the noise spectrum significantly changes with the geometrical shapes of the cylinders. The spectrum becomes narrower by an increase in the side ratio. The main peak frequency reduces when the side ratio increases. The highest value of the maximum sound pressure level, SPL_max are observed for the square cylinder and the lowest value for the rectangular cylinder with the side ratio of 0.6. The peak spectrum becomes like a line spectrum as the cylinder diameter decreases. The main peak frequency decreases when the cylinder diameter increases but it is almost constant with the aspect ratio. At the constant Reynolds number, the broadband noise level and SPL_max decrease with an increase in the cylinder diameter and decrease in the aspect ratio. A good agreement between the numerical and experimental results are obtained.

通过数值分析和实验研究了几何参数对矩形，方形和圆形圆柱体上流动的水声特性的影响。通过使用将RANS与FWH方程相结合的混合方法进行数值模拟。为了验证数值结果，还对圆柱体进行了水声测量。直径为9.5、19.0、38.0和65.0毫米，纵横比为2.5、5.0和10.0的圆柱体用于水声测量和分析。在水声分析中考虑了边长比为0.3、0.6、1.8和3.0的矩形圆柱体以及边长为1.0的正方形圆柱体。雷诺数在2.25×10 ⁴和1.7×10的范围内⁵。由于剪切层分离，重新附着机制和扰动强度的差异，气缸的水声特性完全不同。噪声频谱的形状随圆柱的几何形状而显着变化。通过增加边比，光谱变得更窄。当边比增加时，主峰值频率会降低。最大声压级的_最大值SPL _max观察到方柱为0.6，边柱为0.6的矩形柱的最小值。随着圆柱直径的减小，峰光谱变得像线光谱。当圆柱直径增大时，主峰值频率会降低，但随纵横比的变化几乎恒定。在恒定的雷诺数下，宽带噪声级和SPL _max随着圆柱直径的增加和纵横比的减小而降低。在数值和实验结果之间获得了很好的一致性。