Study on reducing both flow force and cavitation in poppet valves

Hao, Qianhua; Wu, Wanrong; Tian, Guangtian

doi:10.1177/09544062221110729

Cited by 9 publications

(5 citation statements)

References 52 publications

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“…The standard k - ε turbulence model is known for its robustness and cost-effectiveness [ 23 ]. Filo et al [ 24 ] compared the standard, realizable and RNG k - ε turbulence models.…”

Section: Methodsmentioning

confidence: 99%

Throttling characteristics prediction methodology for combined grooves in directional spool valves under variable flow rates

Chen,

Wang,

2023

Heliyon

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“…The standard k - ε turbulence model is known for its robustness and cost-effectiveness [ 23 ]. Filo et al [ 24 ] compared the standard, realizable and RNG k - ε turbulence models.…”

Section: Methodsmentioning

confidence: 99%

Throttling characteristics prediction methodology for combined grooves in directional spool valves under variable flow rates

Chen,

Wang,

2023

Heliyon

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“…By substituting Equation (17) into the vapor volume fraction α V , the cavity density n, and the cavity radius R B for a unified solution, the expression of net mass transfer in the model can be derived as shown in Equation (18).…”

Section: Cavitation Modelmentioning

confidence: 99%

“…The derivation of Equation (18) assumes that the whole process occurs in the period of cavitation generation. To further extend its application range to include the process of cavitation collapse, the mass transportation rate equation can be expressed as follows:…”

Section: Cavitation Modelmentioning

confidence: 99%

“…Meanwhile, Wang et al [17] used different throttling structures in a porous cage to control the flow rate and numerically studied the effects of cavitation and flow uniformity. Hao et al [18] studied the effects of three kinds of lifting valve structures and their parameters on the flow force and cavitation intensity in a valve. Wei et al [19] used the dynamic mesh technique to study the vibration of a valve disc according to the flow-field force and resistance of a valve stem determined in a UDF.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Zhang,

Hu,

Yin

et al. 2024

Processes

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Butterfly valves are widely used in the pipeline transportation industry due to their safety and reliability, as well as their low manufacturing and operation costs. Cavitation is a common phenomenon in the butterfly valve that can lead to serious damage to a valve’s components. Therefore, it is important to investigate the generation and evolution of cavitation in butterfly valves. In this study, LES and the Zwart model were used as the turbulence and cavitation models, respectively, to simulate cavitation through a butterfly valve. The influence of the valve opening degree and inlet flow velocity on dynamic cavitation through the butterfly valve were studied. Furthermore, the cavitated flow field was examined, along with the performance coefficients of the butterfly valve. With the increase in the incoming flow velocity, the high-speed jet zone over a large-range and low-pressure zone appeared inside the downstream of butterfly valve, which affected its stability and the cavitation generation through the valve. Furthermore, the flow coefficient decreased with the increase in vapor volume. In addition, the results indicated that cavitation was more easily induced for smaller valve opening degrees, and the interaction between cavitation and solid walls was stronger. Due to the existence of cavitation, the flow characteristics of butterfly valves are seriously affected.

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“…Wen et al 10 proposed that the standard k-e model is better than SST k-model, BSL-RSM model, RNG k-e model, and realizable k-e model in predicting the loss coefficient and flow coefficient of the valve. Hao et al 11 proposed the reduction method of flow force and cavitation in poppet valves using CFD simulations.…”

Section: Introductionmentioning

confidence: 99%

Modeling and bifurcation analysis of a hydraulic actuator system with different valve spool geometry

Jian

2022

Advances in Mechanical Engineering

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The valve spools of hydraulic actuator systems are usually designed into various geometries to achieve different flow characters. Because of the coupling nonlinear flow rate-pressure character and dynamic motion of the valve spool, self-excited vibration can happen in some working conditions of the system, which can lead to unexpected dynamic performance. The object of this paper is to investigate the stability of a hydraulic system with three different spool geometries, a normal sharp edge spool, a spool with chamfer, and a spool with u shape notches. Computational fluid dynamics (CFD) simulations of flow force and flow rate under different pressure difference and valve openings are proposed to obtain the pressure-flow characters of flow field inside the valves with different spool geometries. A nonlinear dynamic model of the actuator system dynamics is established basing on the CFD results of pressure control valve and the system. Numerical Bifurcation analyses are carried out to study the effect of spool geometries on the bifurcation point of the system. Simulation results suggest that the spool geometries can affect the flow characters of the valve and decrease the stable region of the parameter plane.

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Study on reducing both flow force and cavitation in poppet valves

Cited by 9 publications

References 52 publications

Throttling characteristics prediction methodology for combined grooves in directional spool valves under variable flow rates

Throttling characteristics prediction methodology for combined grooves in directional spool valves under variable flow rates

Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Modeling and bifurcation analysis of a hydraulic actuator system with different valve spool geometry

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