Investigation on the flow characteristics near the duct of a pump-jet propulsion under different advance coefficient conditions

Xu, S. B.; Xiong, Yongliang; Li, Gui-bin; Wei, M. H. Y.; Long, Xinping; Wang, Xincheng

doi:10.1016/j.oceaneng.2023.115304

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…The time-frequency characteristics and nonlinear dynamic characteristics of the pressure pulsation caused by USV were analyzed, and the pulsation characteristics of the thrust were further verified. Xu [16] studied the flow near the outer surface and outlet of the duct, and used the large eddy simulation ( LES ) method to analyze the flow characteristics under different working conditions.Yeming Lu [17] carried out numerical simulation and experimental verification of water-jet propulsion systems with different tip clearance sizes based on the submersible body and non-uniform flow field. The effects of tip clearance on the head, efficiency, thrust and power of the water-jet propulsion system were 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

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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Effects of axial launch spacing on cavitation interference and load characteristics during underwater salvo

Gao,

Shi,

et al. 2024

Applied Ocean Research

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Investigation on the flow characteristics near the duct of a pump-jet propulsion under different advance coefficient conditions

Cited by 8 publications

References 27 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

Effects of axial launch spacing on cavitation interference and load characteristics during underwater salvo

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