Numerical simulation and experimental validation of the cavitating flow through a ball check valve

Valdés, José R.; Rodrı́guez, José M.; Monge, Raúl; Peña, José C.; Pütz, Thomas

doi:10.1016/j.enconman.2013.11.038

Cited by 70 publications

(24 citation statements)

References 21 publications

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“…However, the development of the theoretical foundations of the bubble cavitation process at its early stage remains an urgent problem [4,5]. Known deterministic approaches to the description of the mechanism of bubble cavitation associated with solving systems of equations of mechanics of heterogeneous media have recently become dependent on the implementation of numerical simulation methods [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…7),(8),(10) and correspond to the design parameters of the separators, the operational characteristics of the liquid throttling process, and the physical and mechanical properties of the system; the constants are Set the input parameters of the model. Design parameters for the axial valve separator: hole diameter is3 0 3.5 10 − = × d m; the number of throttle holes in one row is 1 16 = b…”

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confidence: 99%

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The ensemble-averaged characteristics of the bubble system during cavitation in the separator

et al. 2019

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The object of research is the process of formation of vapor-gas bubbles at an early stage of hydrodynamic cavitation during throttling of the liquid in the axial valve separator. Designing a separator under conditions of decreasing bubble formation intensity is an urgent problem. Based on the energy approach, a stochastic model of the formation of an energetically closed system of bubbles in the separator according to the Gibbs ensemble is proposed. Analytical dependences are obtained for the density function and the bubble geometric characteristics averaged over the ensemble, depending on the design parameters, operating parameters, and physic-mechanical properties of the working medium, including the ratio of the gas and vapor contents in the inner cavity of the bubble. The expressions for the indicated distribution function over the size of the bubbles and for the ensemble-averaged characteristics of the system of bubbles formed (diameter and surface area) can be used in the formation of an engineering methodology for calculating control equipment.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

The ensemble-averaged characteristics of the bubble system during cavitation in the separator

et al. 2019

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“…Complementarily, there are also relevant examples of CFD modelling for the study of the valve motion in check valves. The development of deformable meshes and the implementation of deforming grids [21] have allowed the optimization of check valve designs [22] and the analysis of fluid-structure interactions [23], even under incipient cavitation [24].…”

Section: Introductionmentioning

confidence: 99%

Numerical methodology for the CFD simulation of diaphragm volumetric pumps

Alberto

Manuel

Meana-Fernández

2019

International Journal of Mechanical Sciences

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This paper presents the unsteady numerical methodology for the CFD simulation of Air-Operated Diaphragm Pumps. The model reproduces the unsteady displacement of the diaphragm using dynamic mesh techniques and fully resolves the Fluid Structure Interaction (FSI) responsible for the motion of the check valves. The governing parameters have been modified with User Defined Functions (UDFs), using an implicit scheme for the grid motion that guarantees the stability and realizability of the twodimensional model adopted. The analysis of the instantaneous delivered flow rate, as a function of the discharged outlet pressure, has provided interesting and useful information for the future design of new prototypes. The comparison between numerical results and the experimental performance curves has confirmed the accuracy of the model and the correct mesh selection in the small gaps and passages of the pump internal geometry. The leakage flows, especially in the exhausting valve during the forward stroke, and the ball tapping responsible for instabilities and high-frequency noise during oscillations of the valves has been accurately simulated. At high-delivered pressures, it has been observed a characteristic ripple in the instantaneous flow rate during the deceleration of the diaphragm towards its top-dead-center, associated to a partial reopening of the exhausting valve. A closer look to the dynamics of the balls has revealed a strong coupling between inlet and outlet check valves. In addition, despite of the remarkable level of accuracy (less than 9% of deviation), the recirculating cells found in the flow fields inside the pump suggest the convenience of the development of a full-unsteady 3D model in the near future.

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“…R. Amirante, et al [3] and J. R. Valdés at al. [4] conducted numerical simulations and experimental tests on hydraulic valves.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Cavitation Erosion in a Hydraulic Valve

2018

Materials Research Proceedings

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This paper presents a numerical simulation of cavitation of a non-return hydraulic valve. Cavitation is one of the most common reasons of hydraulic system failures or malfunctioning. Due to complex geometry and flow path which may rapidly change, hydraulic valves are exposed to a cavitation phenomenon. Additionally, hydraulic fluid always includes contaminants including dissolver air, which may accelerate nucleation formation. Despite the fact that cavitation is not a fully discovered phenomenon, an attempt of simulation of cavitation process was taken using computational fluid dynamics (CFD) tools.

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Numerical simulation and experimental validation of the cavitating flow through a ball check valve

Cited by 70 publications

References 21 publications

The ensemble-averaged characteristics of the bubble system during cavitation in the separator

The ensemble-averaged characteristics of the bubble system during cavitation in the separator

Numerical methodology for the CFD simulation of diaphragm volumetric pumps

Simulation of Cavitation Erosion in a Hydraulic Valve

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