Numerical investigation on hydrodynamic performance of a pre-swirl stator pump-jet propulsor with special emphasis on energy loss mechanism

Zhao, Xutao; Shen, Xi; Yang, Gang; Xu, Bin; Esch, B.P.M. van

doi:10.1016/j.oceaneng.2023.113836

Cited by 9 publications

(2 citation statements)

References 34 publications

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“…Zhao et. Al [8] used energy balance equations and found viscous effect from the vortex evolution dominate the hydraulic loss in a pump-jet propulsor. Qian et.…”

Section: Introductionmentioning

confidence: 99%

Transient vortical structure evolution under part-load condition in a high-power double-suction centrifugal pump based on Liutex method

Deng,

Pei,

Wang

2024

J. Phys.: Conf. Ser.

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In order to investigate the evolution of vortical structures inside a high-power double-suction centrifugal pump, the flow fields were solved numerically by the SST k-ω turbulence mode. After experimental validation, the Liutex/Rortex method was adopted for identifying vortices for each step from the numerical results, and the enstrophy was adopted to present the kinetic energy that vortical structures contained. The vortical structures at different seconds were obtained, and the vortices evolution was figured out. The results indicate that: the wake vortex was the dominant type inside the volute. Vortical structures at the impeller inlet evolve periodically. The interactions between the impeller leading edge with suction ribs and the blade trailing edge and volute tongues were critical factors for vortex evolution. Vortical structures mainly formed at the impeller inlet near the blade suction side. The suction rib would decrease the absolute rotational intensity around it, but the relative local rigid vortex would keep a high intensity. Due to the suction rib and volute tongues, the vortices variated with a period of 1/2T.

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“…Zhao et. Al [8] used energy balance equations and found viscous effect from the vortex evolution dominate the hydraulic loss in a pump-jet propulsor. Qian et.…”

Section: Introductionmentioning

confidence: 99%

Transient vortical structure evolution under part-load condition in a high-power double-suction centrifugal pump based on Liutex method

Deng,

Pei,

Wang

2024

J. Phys.: Conf. Ser.

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“…Peng et al (2022) compared the flow flied characteristic for various inflow angles to investigate the hydrodynamic performance of pump-jet in the wake of submarines under an oblique sailing condition. Besides, related research studies have also been concerned by other scholars through numerical simulations or experiments (Li et al, 2022; Li et al, 2019; Lu et al, 2020; Pan et al, 2015; Qin et al, 2021; Qiu et al, 2020; Sun et al, 2019; Weng et al, 2022; Zhao et al, 2022). The above series of studies mainly include open water performance, characteristics of excitation forces, cavitation performances, the influence of tip clearance on hydrodynamic characteristics, and evolution mechanisms of vortices among stator–rotor–duct.…”

Section: Introductionmentioning

confidence: 99%

Vibro-acoustic characteristics of a submarine model excited by excitation forces of pump-jet duct

Zhang

2023

Journal of Vibration and Control

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The vibro-acoustic responses of coupled pump-jet-submarine systems excited by fluid excitations on the wall of the duct are numerically investigated. The unsteady excitations are calculated by computational fluid dynamics and the vibration responses for different excitations on the inner and outer walls are contrastively analyzed through establishing a finite element model of the coupled system. Meanwhile, the effect of fluid–structure interaction and the excitation loading methods for the inner flow of duct are considered. The sound radiation characteristics for different excitation sources are predicted through using a boundary element model. The results show that the excitation force spectra of the inner wall have a remarkable discrete peak at blade passing frequency and its multiple, while the excitation force spectra of the outer wall show a broadband characteristic and discrete components appear at blade passing frequency. The modes of hull both dominate the vibro-acoustic responses of the coupled system for different excitation sources of the duct. The transmitted energy for inner excitation forces is significantly greater than that of outer excitation forces, but the sound radiation efficiency is relatively close. The excitations of the duct can transfer to the thrust bearing through stators as well as the hull and cause a coupled vibration between the duct–stator–hull and the shafting system. Besides, the method for applying distributed forces on the inner wall is more reliable.

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Multi-scale leakage vortex interaction analysis in tip clearance of low-head pumped hydroelectric energy storage systems in pump mode

Ye,

Wang,

Mehedi

et al. 2024

Journal of Energy Storage

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Numerical investigation on hydrodynamic performance of a pre-swirl stator pump-jet propulsor with special emphasis on energy loss mechanism

Cited by 9 publications

References 34 publications

Transient vortical structure evolution under part-load condition in a high-power double-suction centrifugal pump based on Liutex method

Transient vortical structure evolution under part-load condition in a high-power double-suction centrifugal pump based on Liutex method

Vibro-acoustic characteristics of a submarine model excited by excitation forces of pump-jet duct

Multi-scale leakage vortex interaction analysis in tip clearance of low-head pumped hydroelectric energy storage systems in pump mode

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