| Citation: | GUO Rong, LI Zhourui, ZHANG Renhui, et al. Influence of structural parameters on hydrodynamic and acoustic performance of the pump-jet propelled submarine[J]. Journal of Aerospace Power, 2025, 40（6）：20220935 doi: 10.13224/j.cnki.jasp.20220935
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In order to study the influence of structural parameters on the hydraulic and acoustic performance of a pump-jet propelled submarine in cruising condition, the DES (detached eddy simulation) was used to calculate the unsteady flow in the whole basin. The pressure fluctuation or velocity fluctuation of the flow field was output as the sound source, and the acoustic FEM (finite element method) was used to predict the flow noise. The experimental study was carried out on the circulating water channel of Lanzhou University of Technology. The noise and thrust information were collected by hydrophone and thrust data acquisition system, and the numerical results were verified. The results showed that fewer impeller and guide vane number and less area ratio of nozzle import and export can improve the internal flow condition of pump-jet. The total thrust of pump-jet propulsor decreased with the increase of the number of impeller blades or the number of guide vane blades, but increased with the increase of the area ratio of nozzle import and export. The open water efficiency decreased with the increase of three structural parameters. The increase of impeller blades number caused all kinds of noise to show an overall upward trend, while the increase of different kinds of guide vane number and area ratio of nozzle import and export showed different influence laws on different kinds of noise. When the structural parameters changed, the directivity distribution of various flow noises was basically the same.
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