Cavitation evolution and radiation noise of a pre-swirl pump-jet propulsor in oblique flow

• DOI: 10.1063/5.0256366
• Publication Date: 2025-02-20T16:25:31Z
• Authors: Sijie Zheng; Qiaogao Huang; Han Li; Xing He; Xinming Li; Bo Lu; Li Zhou
• Keywords: Propulsor

During the submarine's surfacing process, rotor of pump-jet propulsor (PJP) is subjected to nonuniform hydrodynamic loads and cavitation, inducing cavitation-induced noise. In this paper, hybrid Reynolds Averaged Navier–Stokes/Large Eddy Simulation method, Schnerr–Sauer model Ffowcs Williams–Hawkings equations are adopted explore hydrodynamics, excitation force, radiation noise, cavitation evolution PJP with different numbers σn oblique angles θ. The results show that when decreases from 1.5 1.0, rapid development causes performance deteriorate rapidly, total thrust coefficient KT by 28.5%. influence on force less than When θ equals 0 deg, its approximately times 6 deg. As increases deg 24 4 times. contribution noise reflected below 300 Hz, while in range 300–5000 Hz caused cavitation. equal spatial distribution relatively uniform, volume change rate fastest, collapse frequencies almost same. noises superimposed each other, sound pressure level nearly 7 dB higher This research provides a theoretical basis for anticavitation low-noise design PJPs.