Experimental and numerical investigations on the flow-induced vibration and acoustic radiation of a pump-jet propulsor model in a water tunnel

Shi, Shuaikang; Tang, Wanghao; Huang, Xiuchang; Dong, Xiaoxin; Hu, Hua

doi:10.1016/j.oceaneng.2022.111736

Cited by 16 publications

(4 citation statements)

References 19 publications

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“…Zhang [18,19] studied the influence of blade number on the propulsion performance and excitation force of pump-jet propulsor by computational fluid dynamics method, and theoretically and numerically studied the excitation force generation mechanism of pump-jet propulsor ( PJP ) with uniform spacing and non-uniform spacing rotor blades ( ESB and UESB ) after standard submarine model. Some scholars have studied the parameter optimization method of water-jet propeller : Shi [20][21][22] compared the unsteady force spectrum and velocity spectrum characteristics of pump-jet with the characteristics of single rotor and ducted propeller to reveal the influence of duct and pre-swirl stator ; the flow-induced vibration and acoustic radiation characteristics of pump jet in water tunnel are studied.…”

Section: Research Status Of Hydraulic Performance Optimization Of Wat...mentioning

confidence: 99%

Research on Hydraulic Optimization Design Method of Water-Jet Propulsion Pump Considering Hump Index

Long,

Zheng,

Han

et al. 2024

Preprint

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In order to improve the efficiency of water-jet pump and reduce or eliminate the hump phenomenon, it is necessary to optimize the impeller design. In this paper, the optimization of water-jet propulsion pump is studied by combining numerical simulation and experiment.The orthogonal optimization design scheme is established. Based on the numerical simulation method, the hydraulic performance indexes such as energy coefficient, torque coefficient and efficiency of the design points of different design schemes are obtained. The final optimization design is completed by further optimizing the profile and spatial position of the optimal efficiency factor level combination A2B1C1D1 at different spanwise heights.Then, based on the results of numerical simulation by CFX, using Python and LabVIEW programming software, a pump flow head curve fitting and hump judgment program is developed, which can realize the function of curve fitting of flow head, giving the position of trough and peak, and calculating the value of hump climbing coefficient Chump. The influence of different blade structure parameters on the hydraulic performance and energy characteristic curve hump of the water-jet pump is analyzed, and the optimization design of the high-performance water-jet pump considering the hump index is completed. In summary, This method is not only applicable to the hydraulic optimization of the water-jet propulsion pump, but also the research results can provide theoretical basis and technical support for the high-performance and low-vibration design of the water jet propulsion pump.

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Section: Research Status Of Hydraulic Performance Optimization Of Wat...mentioning

confidence: 99%

Research on Hydraulic Optimization Design Method of Water-Jet Propulsion Pump Considering Hump Index

Long,

Zheng,

Han

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Section: Research Status Of Hydraulic Performance Optimization Of Wat...mentioning

confidence: 99%

Research on hydraulic optimization design method of water-jet propulsion pump considering hump index

Long,

Zheng,

Han

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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：In order to improve the efficiency of water-jet pump and reduce or eliminate the hump phenomenon, it is necessary to optimize the impeller design. In this paper, the optimization of waterjet propulsion pump is studied by combining numerical simulation and experiment.The orthogonal optimization design scheme is established. Based on the numerical simulation method, the hydraulic performance indexes such as energy coefficient, torque coefficient and efficiency of the design points of different design schemes are obtained. The final optimization design is completed by further optimizing the profile and spatial position of the optimal efficiency factor level combination A2B1C1D1 at different spanwise heights.Then, based on the results of numerical simulation by CFX, using Python and LabVIEW programming software, a pump flow head curve fitting and hump judgment program is developed, which can realize the function of curve fitting of flow head, giving the position of trough and peak, and calculating the value of hump climbing coefficient Chump. The influence of different blade structure parameters on the hydraulic performance and energy characteristic curve hump of the water-jet pump is analyzed, and the optimization design of the high-performance water-jet pump considering the hump index is completed.In summary, This method is not only applicable to the hydraulic optimization of the water-jet propulsion pump, but also the research results can provide theoretical basis and technical support for the high-performance and low-vibration design of the water jet propulsion pump.

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“…The hydrodynamic performance of pump-jet has made great progress by using appropriate numerical calculation models, such as Reynolds-averaged Navier–Stokes (RANS) and large eddy simulation (LES) (Shi et al, 2022; Yu et al, 2020). 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.…”

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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Experimental and numerical investigations on the flow-induced vibration and acoustic radiation of a pump-jet propulsor model in a water tunnel

Cited by 16 publications

References 19 publications

Research on Hydraulic Optimization Design Method of Water-Jet Propulsion Pump Considering Hump Index

Research on Hydraulic Optimization Design Method of Water-Jet Propulsion Pump Considering Hump Index

Research on hydraulic optimization design method of water-jet propulsion pump considering hump index

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

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