The scale effects on the open water performance of a pump-jet propulsor

Han, Lina; Huang, Qiaogao; Pan, Guang; Dong, Xinguo

doi:10.1007/s00773-021-00838-6

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…There have been few studies on scale effects for PJPs. Li et al 35 conducted a numerical analysis of scale effects for PJPs and found that as the advance coefficient increases, the scale effect of the rotor is greater, the flow separation of the duct is weakened and the tip leakage vorticity increases, although it becomes more restricted as the advance coefficient increases. Yang et al 36 studied the scale effects for PJPs using an internal solver and found that the change in the total thrust and torque coefficient was mainly contributed by the rotor.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the scale effects of pump-jet propulsor with a pre-swirl stator

et al. 2023

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In this study, the performance of a pump-jet propulsor (PJP) with pre-swirl stator in open water is numerically investigated. Both full-scale and model-scale configurations are considered. The Reynolds-averaged Navier–Stokes equations and shear stress transport [Formula: see text] turbulence model are used in the numerical calculation. The computational domain is discretized using structured grids, and a rotating grid is affixed to the rotor to deal with the relative motion between the rotor and stationary components. The mesh quality is determined based on a grid uncertainty analysis. The numerical method is validated using model-scale experimental data. The simulation results reveal the influences of the scale size on the hydrodynamic performance and the distributions of the velocity, pressure and vorticity under three advance coefficients. With the increase in the advance coefficients, the scale influences on the efficiency become more obvious, and the efficiency of the full-scale PJP is always higher than that of the model-scale PJP. The full-scale configuration is found with a more significant instability in the gap vortex development, because it presents larger interaction between tip leakage vortex (TLV) and the inner wall of the duct. As the main velocity increases, the TLV shedding is delayed. Finally, the development process of gap vortices is analyzed for the difference operation conditions.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of the scale effects of pump-jet propulsor with a pre-swirl stator

et al. 2023

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“…Xi [11] subsequently clarified that the generation of tip leakage vortex dominates the energy loss in the PJP rotor domain and wake flow field. However, Li [12] adds that tip clearance leakage flow has little influence on pipeline outlets.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tip Clearance on the Cavitation Performance of High-Speed Pump-Jet Propeller

Gan,

Duan,

et al. 2023

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To investigate the impact of tip clearance variation on the cavitation performance of a high-speed pump-jet propeller, Fluent software was employed for simulation calculations. The study utilized the RNG k-ε turbulence model and ZGB cavitation, conducting three-dimensional numerical simulations under both steady and transient conditions. A pump-jet propeller with a rated speed of 20,000 r/min was used to set three kinds of clearance for simulation, and the simulation proved to be reliable by comparison with the experiment. Initially, the analysis examined the effect of tip clearance on cavitation characteristics and cavitation volume under steady-state conditions, while also studying the distribution patterns of cavitation. Subsequently, the radial force and pressure pulsation of the jet propeller are analyzed by FFT processing, aiming at the influence of tip clearance on the structural strength of the pump-jet propeller. Under the design conditions, the smaller tip clearance shows better performance, while the larger tip clearance shows stronger anti-cavitation ability than the smaller clearance. In addition, the greater the tip clearance, the greater the radial force and pressure pulsation, which will adversely affect the pump-jet structure. The research results provide some references for further research on the effect of high-speed pump-jet propeller structures on performance.

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Investigating the Effect of the Number of Rotor and Stator Blades on the Hydrodynamic and Hydroacoustic Performance of the Pump Jet

Shakeri¹,

Ghiasi²

2023

Preprint

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The scale effects on the open water performance of a pump-jet propulsor

Cited by 4 publications

References 22 publications

Numerical investigation of the scale effects of pump-jet propulsor with a pre-swirl stator

Numerical investigation of the scale effects of pump-jet propulsor with a pre-swirl stator

Effect of Tip Clearance on the Cavitation Performance of High-Speed Pump-Jet Propeller

Investigating the Effect of the Number of Rotor and Stator Blades on the Hydrodynamic and Hydroacoustic Performance of the Pump Jet

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