Experimental Study of Effects of Air Content on Cavitation and Pressure Fluctuations

Ye, Jinming; Xiong, Ying; Li, Fang; Shuang-qiao, Chen

doi:10.1016/s1001-6058(09)60097-4

Cited by 19 publications

(6 citation statements)

References 5 publications

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“…The mesh consisted of about 400000 elements. The multiphase mixture flow model coupled with the cavitation model developed by Singhal et al (YE et al, 2010) was utilized, since it accounts for the effect of non-condensable gases, which can significantly affect the cavitation intensity. The standard k-ε model was used to solve turbulence.…”

Section: Fluid-dynamic Researchmentioning

confidence: 99%

A Review of Electro-Hydraulic Servovalve Research and Development

Tamburrano

Plummer

Distaso

et al. 2019

TJFP

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This paper provides a review of the state of the art of electro-hydraulic servovalves, which are widely used valves in industrial applications and aerospace, being key components for closed loop electrohydraulic motion control systems. The paper discusses their operating principles and the analytical models used to study these valves. Commercially available units are also analysed in detail, reporting the performance levels achieved by current servovalves in addition to discussing their advantages and drawbacks. Adetailed analysis of research that investigates these valves via computational fluid dynamic analysis is also provided. Research studies on novel control systems and novel configurations based on the use of smart materials, wh

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Section: Fluid-dynamic Researchmentioning

confidence: 99%

A Review of Electro-Hydraulic Servovalve Research and Development

Tamburrano

Plummer

Distaso

et al. 2019

TJFP

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“…These abovementioned studies focus on the cavitation control of the xed boundary, and those of the dynamic boundary in engineering applications have also attracted the attention of some researchers. Ye et al [30] found that the degree of tip vortex cavitation in the propeller depended on the air content. As the air content increased, the instability of the tip vortex cavitation and the amplitude of pressure uctuations decreased.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on effects of air injection on cavitation pressure pulsation and vibration in a centrifugal pump with inducer

Mao,

Liu,

Wang

et al. 2023

J Hydrodyn

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Cavitation commonly induces performance deterioration and system vibration in many engineering applications. This paper aims to investigate the effects of air injection on cavitation evolution, pressure pulsation and vibration in a centrifugal pump with inducer. In this paper, the high-speed camera is used to capture the gas ow pattern and cavitation evolution process in the inducer. The impacts of air injection on the inlet pressure pulsation and vibration are also investigated. The results show that the cavitation development in the inducer undergoes four patterns: incipient cavitation, sheet cavitation, cloud cavitation and super cavitation. As the cavitation becomes more severe, the main frequency of the pressure pulsation shifts to lower frequencies, and the amplitude of the vibration increase. In addition, air injection promotes the incipient cavitation but delays the cavitation development. A small amount of air makes cavity shed with small-scale clusters. Meanwhile, it can effectively decrease amplitudes of pressure pulsation and vibration. As the air content increases, the uctuations and amplitudes of pressure pulsation and vibration increase.

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“…Literature [8] studies effects of air content on cavitation and pressure fluctuations on the ship screw. From the results of the measurement, it is shown that air content has a great effect on the pressure fluctuations induced by the cavitating propeller.…”

Section: Introductionmentioning

confidence: 99%

Mathematical and experimental modelling of flow of air-saturated water through a convergent-divergent nozzle

Jablonská

Bojko

2016

EPJ Web of Conferences

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Abstract.In hydraulic elements an under-pressure is generated during fluid flow around sharp edges or changing the flow cross-section (e.g. for valves, switchgear, nozzles). In these locations air suction by leakages or release of air from the liquid during cavitation may occur. When flow modelling using classical mathematical model of cavitation at higher flow rates there is disagreement in the measured and calculated hydraulic variables before and behind hydraulic element. Therefore, it is necessary to use a mathematical model of cavitation applied to the three-phase flow (water, vapour, air). Nowadays it is necessary to look for mathematical approaches, which are suitable for quick engineering use in sufficiently precision numerical calculations. The article is devoted to theoretical investigation of multiphase mathematical model of cavitation and its verification using a laboratory experiment. At first case the k-İ RNG turbulent mathematical model with cavitation was chosen in accordance [9] and was applied on water flow with cavitation (water and vapour) in a convergent-divergent nozzle. In other cases a solution of water flow with cavitation and air saturation was investigated. Subsequently, the results of mathematical modelling and experimental investigation focused on monitoring of air content and its impact on the value of hydraulic parameters and the size of the cavitation area were verified.

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Experimental Study of Effects of Air Content on Cavitation and Pressure Fluctuations

Cited by 19 publications

References 5 publications

A Review of Electro-Hydraulic Servovalve Research and Development

A Review of Electro-Hydraulic Servovalve Research and Development

Experimental study on effects of air injection on cavitation pressure pulsation and vibration in a centrifugal pump with inducer

Mathematical and experimental modelling of flow of air-saturated water through a convergent-divergent nozzle

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