Structural optimization of downhole float valve via computational fluid dynamics

Xu, Yuqiang; Guan, Zhichuan; Liu, Yongwang; Liu, Xuan; Zhang, Hongning; Xu, Chuanbin

doi:10.1016/j.engfailanal.2014.04.033

Cited by 14 publications

(4 citation statements)

References 9 publications

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“…Since the fundamental theory on fluid force of the slide valve has been built based on the momentum theorem, numerous researchers have validated the theoretical analysis, 10 improved valve structure 11 and conducted profound work by means of the computational fluid dynamics (CFD) methods. 12 For the conventional directional 13 and proportional valves, 14 the computational analysis was applied to figure out the cavitation phenomenon and existing design defects. For other valves like relief valve 15 and pressure control valve, 16 computational analysis focused on complete transient process of the valve opening and closure with moving mesh such as mesh deformation with boundary.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics and experimental analysis on flow rate and torques of a servo direct drive rotary control valve

Zhu

Zhao

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper aims to analyze the flow characteristics and fluid torques in a direct drive rotary control valve with a novel structure, and based on the computational fluid dynamics method, the advantages of improved structure are verified. With the establishment of the valve structure and the simulation model, the sliding mesh model and moving region grid are applied to simulate the complete opening and closing process of the valve at dynamic conditions. The results present that the fluid torques generate resistance torques during the increasing process of flow area while providing driving torques in the decreasing period of flow area, which is consistent with the theoretical analysis. In addition, the flow regulation of the fluid chamber is conducted with the computational fluid dynamics method and experimental test, which exhibited disagreement due to the oil leakage phenomenon. The simulation results and experimental results both convince the pressure and flow characteristics, and the improved valve model shows decreased fluid torques of around 17% compared with the original one under the system pressure of 6 MPa.

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Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics and experimental analysis on flow rate and torques of a servo direct drive rotary control valve

Zhu

Zhao

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…So, expression (8) can be written as: (11) where F lum represents the lumped uncertainty of the PSV and is bounded by a constant δ. By combining expression (8) and (11), it can be derived as:…”

Section: Nominal Dynamic Model Of Psvmentioning

confidence: 99%

Fuzzy-Type Fast Terminal Sliding-Mode Controller for Pressure Control of Pilot Solenoid Valve in Automatic Transmission

Fan

Cheng

et al. 2019

IEEE Access

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The performance of the pilot solenoid valve (PSV) has a significant impact on the efficiency and service life of an automatic transmission (AT) in automobiles, and it is very difficult to achieve a perfect pressure tracking performance due to the sophisticated combination of mechanical, hydraulic and electromagnetic characteristics inside the PSV. In this paper, based on a nominal nonlinear dynamic model of the PSV including uncertainties and an external disturbance, a fast terminal sliding-mode control (FTSMC) method is developed to achieve tracking precision and robustness in the pressure control of the PSV. To alleviate the chattering phenomenon in the control input signal, fuzzy logic rules are established to tune the switching control coefficient of the control law in FTSMC controller. Compared with the trend-law-based sliding-mode control (TLSMC) method and PID method, the developed fuzzy-type fast terminal slidingmode control (F-FTSMC) method achieves the shortest settling time, the smallest tracking error at steady state and almost no chattering in the control input by intelligently changing the control law. Simulations and experiments are demonstrated to verify the effectiveness and excellent advantages of the proposed controller. INDEX TERMS Fast terminal sliding mode control, fuzzy control, pressure control, pilot solenoid valve, automatic transmission.

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“…Woo et al 12 analyzed flow distribution of a reed valve and found its maximum performance using CFD. Xu et al 13 performed structural optimization of a downhole float valve. Lee et al 14 and Chern et al 15 performed simulations to find out ways to minimize cavitation effect inside valves.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics analysis on orifice structure inside valve core of pilot-control angle globe valve

Jin

Gao

Zhang

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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A novel pilot-control angle globe valve is proposed, and it has an obvious advantage of energy conservation during its opening and closing process. In pilot-control angle globe valve, the opening and closing forces are related to the orifice located inside the valve core. In this paper, the effects of orifice diameter are thoroughly studied under different working conditions such as valve core displacements and inlet velocities. To begin with, the numerical model is validated by comparing similar angle valves, and then the flow and loss coefficients under different orifice diameters are discussed. It is found that the effects of orifice diameter on force acting on valve core depend on valve core displacement and inlet velocity. Thus different valve core displacements and inlet velocities combined with different orifice diameters are further studied. It is also found that when the orifice diameter is larger than 12 mm, pilot-control angle globe valve cannot be used under small inlet velocity or large valve core displacement. In addition, formulas to calculate forces on valve core are proposed for further orifice design. This work can be referred in process industries especially in a piping system with orifice plates or globe valves.

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Structural optimization of downhole float valve via computational fluid dynamics

Cited by 14 publications

References 9 publications

Computational fluid dynamics and experimental analysis on flow rate and torques of a servo direct drive rotary control valve

Computational fluid dynamics and experimental analysis on flow rate and torques of a servo direct drive rotary control valve

Fuzzy-Type Fast Terminal Sliding-Mode Controller for Pressure Control of Pilot Solenoid Valve in Automatic Transmission

Computational fluid dynamics analysis on orifice structure inside valve core of pilot-control angle globe valve

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