Experimental and numerical analysis of cavitation in hydraulic proportional directional valves

Amirante, Riccardo; Distaso, Elia; Tamburrano, Paolo

doi:10.1016/j.enconman.2014.07.031

Cited by 111 publications

(63 citation statements)

References 14 publications

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“…Works on hydraulic proportional valves allowed to find the best approach to the study of devices affected by cavitation (Amirante, R., et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Musina¹,

Tselischev²,

Tselischev³

et al. 2015

MAS

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The problems of braking and positioning of hydraulic actuators are an integral part of output speed control in hydro-pneumatic actuators. This article is focused on a hydraulic braking of driven elements of machines and mechanisms which is carried out by devices known as brake valves (counterbalance, load control, over-centre valves). Brake valves are used to exclude overrunning speed under passing loads when the external load direction coincides with the direction of movement (rotation) of the hydraulic actuator. They provide a constant pressure in pressure line and prevent cavitation. In this article the design and operation of brake valves are analyzed. The need for brake valves in hydraulic machines with hydraulic actuators under a passing load is proved. As a result of theoretical research a mathematical model of dynamics of hydraulic actuator with a brake valve has been developed. This model unlike others takes into account the design of main and control spools of the brake valve. The problem of logging-running unit braking is solved by the use of the hydraulic brake valve as a part of hydraulic logging system.

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“…Works on hydraulic proportional valves allowed to find the best approach to the study of devices affected by cavitation (Amirante, R., et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Musina¹,

Tselischev²,

Tselischev³

et al. 2015

MAS

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“…More recent studies have shown the value of CFD when determining the effects of water hammer in pipes [8]. Further, CFD have been used successfully to model cavitation and the risk of cavitation erosion in diesel injectors [9,10] and hydraulic valves [11,12]. However, the cavitation in these studies is a consequence of the accelerated flow and cavitation as the result of hydraulic transients has not been considered.…”

Section: Introductionmentioning

confidence: 99%

Water Hammer Induced Cavitation - A Numerical and Experimental Study

Jansson

Andersson²,

Pettersson

et al. 2017

Linköping Electronic Conference Proceedings

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Cavitation erosion is one of the main concerns in hydraulic rock drills and can reduce both performance as well as life span. Current simulation tools can detect a potential risk of cavitation, however, the equations do not include cavitation physics and therefore cannot estimate the severity nor erosion locations. In order to evaluate the cavitation damage, long term tests are performed which are both costly and time consuming. With better computational capacity and more accurate numerical flow models, the possibilities to simulate the course of cavitation have increased. So far, most numerical studies on cavitation focus on steady-state problems while studies on hydraulic transients and water hammer effects have received less attention. This paper is a step towards simulation of water hammer induced cavitation and cavitation erosion in pipe flow using Computational Fluid Dynamics (CFD). In order to validate the results, experimental measurements are performed with a test equipment that creates hydraulic transients in a pipe and records these using piezoelectric pressure sensors. The results from CFD are compared to both the experimental data and to numerical results from a software called Hopsan, a one-dimensional multi-domain system simulation tool that uses wave characteristics to calculate pressures and flows. For smaller transients where no cavitation occur, all results show good agreement. For larger transients with cavitation, the results from Hopsan do not longer agree with the measurements, while the CFD model still performs well and is able to predict both formation and collapse of cavitation.

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“…Gholami et al (2014) observed the cavitation phenomenon in a vaned ring-type needle valve by a numerical method. Amirante et al (2014) analyzed the cavitation in a hydraulic proportional directional valve by experimental and numerical methods. Valdés et al (2014) validated numerically and experimentally the cavitating flow through a ball check valve.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements

Qian

Jin

2016

JZUS-A

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Abstract:The pilot-control globe valve (PCGV) is a novel globe valve with a piston-type valve core and a small pilot valve. It can utilize a pressure difference to control the state of the main valve by the pilot valve. In this paper, a mathematical model of PCGV is established and a computational fluid dynamics (CFD) method is used to numerically simulate its flow and cavitation characteristics. Analysis of the pressure difference between the upside and downside of the valve core and comparison with similar previous work increase the reliability of the simulation. Then an analysis of flow and cavitation characteristics is carried out with three comparisons: a comparison between opened and closed states, a comparison between different inlet velocities, and a comparison between different valve core displacements. The results demonstrate that the vapor volume fraction reaches its peak point at the valve seat near the outlet tube, and that a higher inlet velocity or smaller valve core displacement can cause greater cavitation damage. This study can help further design work for optimization and engineering applications of PCGV.

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Experimental and numerical analysis of cavitation in hydraulic proportional directional valves

Cited by 111 publications

References 14 publications

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Water Hammer Induced Cavitation - A Numerical and Experimental Study

Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements

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