关键词:
Pump-jet propulsor
Hydrodynamics
Turbulence modeling
Thrust fluctuation
Radiated noise
Pre-swirl stator
摘要:
The requirement of low radiated noise is increasing for underwater propulsors as the noise significantly affecting the comfort and quietness of ships,submarines,and *** broaden the view of noise characteristics of pump-jet propulsors(PJPs),this paper considers the radiated noise of a pre-swirl stator PJP with the effects of the advance coefficient and rotor rotational *** noise is obtained by the“hybrid method”approach,which combines a hydrodynamic solver with a hydroacoustic *** turbulence flow is obtained through improved delayed detached eddy simulation(IDDES),which show good agreement with the experiment,including the performance and flow *** solver precision,permeable surface size,and sampling frequency notably affect the noise *** spectra of thrust fluctuation and radiated noise are characterized by the tonal phenomenon around the blade passing frequency and its *** spectrum of radiated noise and overall sound pressure level(OSPL)are considerably affected by both the advance coefficient and the rotor rotational ***,the numerical results and analysis given in this paper should be partly helpful in deepening the understanding of the radiated noise characteristics of PJPs.