Numerical Study of Hydrodynamic Noise of a Cone-column Combined Structure

[摘要] Hydrodynamic noise is one of the main sound source of underwater vehicle. Flow noise and flow-excited noise are important part of hydrodynamic noise. In this paper, large eddy simulation is applied to simulate the flow field around a cone-column combined structure to obtain dipole sound source and turbulence fluctuating pressure. The surface pressure distribution is validated by experiment measured data. Structure dynamic response can be obtained by solving fluid-structure coupling equation. The flow noise and flow-excited noise of the structure are calculated according to acoustic analogy theory. From the numerical result, it can be seen the spectra characteristic of flow-excited noise is different from flow noise. The flow-excited noise obviously increases when system resonance occurs.

[发布机构] College of Shipbuilding Engineering, Harbin Engineering University, Harbin; 150001, China^1;China Ship Development and Design Center, Wuhan; 430064, China^2

[效力级别] 材料工程

[关键词] Combined structure;Flow-excited noise;Fluctuating pressures;Fluid structure couplings;Hydrodynamic noise;Spectra characteristic;Surface pressure distribution;Underwater vehicles