Experimental and numerical analysis of spring stiffness on flow and valve core movement in pilot control globe valve

Qian, Jin-yuan; Гао, Зонгшенг; Wang, Jiankai; Jin, Zhi Min

doi:10.1016/j.ijhydene.2017.05.190

Cited by 31 publications

(12 citation statements)

References 31 publications

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“…e model was based on a pilot-control globe valve and simulated in ANSYS FLUENT 17.0, maintaining all the parameter settings the same as those of Qian et al [24]. Figure 8 shows the steady valve plug displacement for our computational results and experimental results of Qian et al [24]. e trends of the simulation results and experimental results were within an acceptable range.…”

Section: Fluent Validationmentioning

confidence: 87%

“…In order to prove the reliability of the parameter settings and the solution scheme in the FLUENT simulation, a comparison validation was performed with the results of Qian et al [24]. e model was based on a pilot-control globe valve and simulated in ANSYS FLUENT 17.0, maintaining all the parameter settings the same as those of Qian et al [24].…”

Section: Fluent Validationmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Simulation of a Warship Control Valve Based on a Mechanical-Electric-Fluid Cosimulation Model

Han

Xie

Wang

et al. 2021

Science and Technology of Nuclear Installations

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Control valves have an important function in the warship power system. In engineering practice, the fluid oscillation inside the control valve causes the additional load to the valve actuator. When the additional load is added to the original load of the valve, it is possible that the required driving force (or driving moment) of the valve is greater than the maximum force (or moment) output by the actuator, which may cause the abnormal stop of the actuator. Conventionally, the interaction effect of the valve mechanical and electric components on the valve chamber’s flow field cannot be considered in computational fluid dynamics (CFD) simulations, so the oscillating fluid loads cannot be accurately obtained. In order to solve this problem, the mechanical-electric-fluid integrated valve model, using the FLUENT and AMESim cosimulation method, was developed to embody the interaction effect between the components of each part of the control valve and exhibit the fluid oscillation during the operating process of the control valve. Compared with the pure software simulations, the unsteady flow characteristics and dynamic response of the actuator were synchronously obtained in this study, which accurately captured the sudden fluid loads required for further compensation. At the same time, the differences in performance of different valve plugs were compared. The stability time of the valve plug and oscillation amplitude of the unstable fluid loads were distinct for control valves with different flow characteristics. The results can aid in understanding the instability mechanism of the fluid load in the control valve better, which provides the calculation basis for compensating the additional load on the valve plug and improve the reliability of the control valve.

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Section: Fluent Validationmentioning

confidence: 87%

Section: Fluent Validationmentioning

confidence: 99%

Dynamic Simulation of a Warship Control Valve Based on a Mechanical-Electric-Fluid Cosimulation Model

Han

Xie

Wang

et al. 2021

Science and Technology of Nuclear Installations

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“…Qian et al analyzed the influence of spring stiffness on the flow characteristics and response time of fastresponse valves. e research conclusions were used in the design and flow control of the new valve [10]. Okhotnikov et al studied the steady-state flow state and hydraulic characteristics of the flow control valve, predicted the torque and pressure drop caused by steady-state flow, and improved the controllability of the valve [11].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Characteristics of a Combination Microflow Control Valve

Wang

Liu

Chen

et al. 2021

Mathematical Problems in Engineering

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Flow control valves have broad application prospects in aviation hydraulic systems. This paper proposes a combination microflow control valve (CMCV) instead of the traditional valve to optimize the performance. Influences of structural parameters of CMCV on its characteristics are numerically investigated to determine the static and dynamic characteristics of CMCV. The calculation results indicate that there is a negative feedback control between stages of the flow regulator, the orifice pressure drop is compensated, and the flow regulation deviation is reduced. The orifice area and the flow regulator valve port area have significant effects on flow characteristics. The diameter of orifice, the spring stiffness, the number of throttle holes, and the ultimate displacement of sleeve are positively correlated with the flow rate stability value of the valve. The valve port flow area gradient and initial overlap of the flow regulator affect the flow rate fluctuation range and response time of CMCV.

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“…2 Many researchers have studied the modeling and dynamic characteristic analysis of hydraulic valves. [3][4][5] Self-excited vibration induced by the inherent nonlinear characteristics of valve spool motion coupled with fluid dynamics can be generated during working state of the hydraulic systems due to inappropriate system parameters, which causes the system to sustain instability and leads to unexpected performance and hardware damage. 6,7 A thorough understanding of stability and vibration suppression of the system is a problem of great practical significance for optimizing the performance of the hydraulic servo system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear modeling and stability analysis of a pilot-operated valve-control hydraulic system

Wei

Jian

Yan

et al. 2018

Advances in Mechanical Engineering

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A nonlinear dynamic model is developed to analyze the stability of a pilot-operated valve-control hydraulic system. The dynamic model includes motion of the valve spool and fluid dynamics in the system. Characteristics such as pressure flow across the valve port and orifices, pressure, and flow rate in valve chambers are taken into consideration. Bifurcation analysis is proposed and examined by numerical simulation results when the feedback orifice diameter changes. The effects of different system parameters such as pilot-operating pressure, spring stiffness, and overlap of inlet port on the stability border of the system are studied by two-dimensional bifurcation analyses. The study identifies that bifurcation can occur in the system and lead to sustained self-excited vibration with parameters in certain region of the parameter space. It suggests that the vibration can be effectively predicted and prevented by selecting system parameters from the asymptotic stable parameter region.

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Experimental and numerical analysis of spring stiffness on flow and valve core movement in pilot control globe valve

Cited by 31 publications

References 31 publications

Dynamic Simulation of a Warship Control Valve Based on a Mechanical-Electric-Fluid Cosimulation Model

Dynamic Simulation of a Warship Control Valve Based on a Mechanical-Electric-Fluid Cosimulation Model

Investigation on the Characteristics of a Combination Microflow Control Valve

Nonlinear modeling and stability analysis of a pilot-operated valve-control hydraulic system

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