Numerical prediction of hydrodynamic noise of submerged waterjet

FU Jian; DING Jiang-ming; LI Jia

doi:10.16411/j.cnki.issn1006-7736.2023.01.009

Journal of Dalian Maritime University >

2023 , Vol. 49 >Issue 1: 85 - 92

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2023.01.009

Numerical prediction of hydrodynamic noise of submerged waterjet

FU Jian ,
DING Jiang-ming ,
LI Jia

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(1. Naval Submarine Academy，Qingdao 266100，China；2. School of Naval Architecture，Ocean and Energy Power Engineering，Wuhan University of Technology，Wuhan 430063，China)

Received date: 2022-07-21

Revised date: 2022-08-19

Online published: 2022-08-19

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Abstract

In order to understand the characteristic of submerged waterjet hydrodynamic noise, the numerical prediction method of waterjet noise was explored by using point source model and doundary element method. The characteristics of fluctuating pressure on the inner wall of duct and the shielding effect of the duct on the acoustic field of the impeller were analyzed. The results show that the interaction between impeller and stator of submerged waterjet thruster results in strong radial force pulsation, that caused the stationary parts sound field contribution the most radially. The duct has shielding effect on the sound field of rotating impeller in a large range, and most prominent in radial. As result, there is a big difference between the sound field directivity of impeller and propeller.

Key words： ship; submerged waterjet propeller; hydrodynamic noise; point source model; boundary element method; computational fluid dynamics

Cite this article

FU Jian , DING Jiang-ming , LI Jia . Numerical prediction of hydrodynamic noise of submerged waterjet[J]. Journal of Dalian Maritime University, 2023 , 49(1) : 85 -92 . DOI: 10.16411/j.cnki.issn1006-7736.2023.01.009

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