王开春, 马洪林, 赵凡, 官睿. 围壳形状对潜艇流致噪声的影响计算[J]. 空气动力学学报, 2018, 36(5): 774-779. DOI: 10.7638/kqdlxxb-2016.0054
引用本文: 王开春, 马洪林, 赵凡, 官睿. 围壳形状对潜艇流致噪声的影响计算[J]. 空气动力学学报, 2018, 36(5): 774-779. DOI: 10.7638/kqdlxxb-2016.0054
WANG Kaichun, MA Honglin, ZHAO Fan, GUAN Rui. Numerical simulation for effects of submarine fairwater shape on flow-induced noise[J]. ACTA AERODYNAMICA SINICA, 2018, 36(5): 774-779. DOI: 10.7638/kqdlxxb-2016.0054
Citation: WANG Kaichun, MA Honglin, ZHAO Fan, GUAN Rui. Numerical simulation for effects of submarine fairwater shape on flow-induced noise[J]. ACTA AERODYNAMICA SINICA, 2018, 36(5): 774-779. DOI: 10.7638/kqdlxxb-2016.0054

围壳形状对潜艇流致噪声的影响计算

Numerical simulation for effects of submarine fairwater shape on flow-induced noise

  • 摘要: 针对潜艇在航行中产生的流噪声现象,建立了适合于潜艇绕流过程中流噪声计算的三维数值方法和计算程序。其基本思路为:采用多块技术与SIMPLE方法求解RANS方程计算定常流场,在稳态流场的基础上,采用迭代时间推进法和DES湍流模型求解非定常流场,再根据瞬态流场结果采用Lighthill声比拟方法获得声观测点随时间变化的声压。对尺度放大的潜艇标模SUBOFF以及三种改进的围壳外形进行了流致噪声比较计算,获得了不同围壳外形的声压频谱和总声压特性以及典型模型的表面脉动压力分布规律。结果表明:把潜艇围壳后缘形状从矩形变为梯形,可控制围壳的尾流摆动,能够有效降低潜艇流噪声,最大的降噪效果可达5 dB左右。

     

    Abstract: A three-dimensional computation code is developed to predict the flow-induced noise during a submarine navigation. In this code, steady RANS flow field is firstly computed by using the SIMPLE method with multi-block grid, and then unsteady flow-field is solved with iterative time-marching method and the DES turbulence model. On the basis of the flow simulation results, the time history of sound pressure is obtained with the Lighthill acoustic analogy. Numerical simulations for a scale-up submarine model of SUBOFF and three modified models are performed by this procedure. The noise spectra at observation points are calculated for different submarine fairwater shapes. Moreover, the distributions of the fluctuating pressure level on the surface of typical submarine models are obtained. The computation results show that the swaying motion in the wake flow can be controlled when the rear edge shape of the fairwater is remodeled from rectangle into trapezia, and the submarine flow noise can be effectively reduced by 5 dB for the optimal submarine shape.

     

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