Nonreflective Boundary Design via Remote Sensing and Proportional-Integral-Derivative Control Valve

Zhang, Qinfen Katherine; Karney, Bryan W.; Pejovic, Stanislav

doi:10.1061/(asce)hy.1943-7900.0000403

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…Thus suppressing water hammer is important to improve the work conditions as well as the performance of the hydraulic steering systems. Suppressing water hammer can be undertaken by optimizing transient flow of the system, [1][2][3] optimizing the sizes and selection of the components, 4,5 extending the settling time of the solenoid valve, 6,7 introducing the pressure relief valve 8 or in-line check valve, 9 installing a surge suppressor which is actually a hydraulic accumulator 7,[10][11][12][13] and so on. Installing a suitable accumulator is a low-cost, simple, and practical method in engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Suppressing water hammer of ship steering systems with hydraulic accumulator

Qiu

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part E:

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This article is a contribution to the design of the hydraulic steering system with an accumulator of different parameters on suppressing water hammer. The accurate model taking account of the characteristics of the entrance of the hydraulic accumulator, which have great influence on the frequency characteristics of the accumulator is developed. In addition, this article proposes a more comprehensive distributed parameter model of the hydraulic steering system with an accumulator installed before the proportional directional valve, which takes into account both the relief valve and the pipeline between the hydraulic accumulator and the proportional directional valve. The dynamic characteristics of the hydraulic steering system were analyzed both in the frequency and time domain. The numerical simulation of water hammer which used a holistic unsteady-friction model has been performed by the method of characteristics and finite difference method with spatial interpolation using Fortran language. The law that the natural frequency of the accumulator which is equal or approximate to the frequency of water hammer in pipeline has good effect on suppressing water hammer is validated by analytical and numerical simulations as well as experimental results, for the design of the nominal volume and charged pressure of the hydraulic accumulator in the hydraulic steering system.

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Section: Introductionmentioning

confidence: 99%

Suppressing water hammer of ship steering systems with hydraulic accumulator

Qiu

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part E:

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Instability of the Tank-Level Control System of Water Mains in Mountainous Environments

Vesipa

2019

J. Hydraul. Eng.

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Unsteady Flow Modeling of Pressure Real-Time Control in Water Distribution Networks

Creaco

Campisano

Franchini

et al. 2017

J. Water Resour. Plann. Manage.

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This paper investigates the potential of unsteady flow modelling for the simulation of remote real-time control (RTC) of pressure 6 in water distribution networks. The developed model combines the unsteady flow simulation solver with specific modules for generation of 7 pulsed nodal demands and dynamic adjustment of pressure control valves in the network. The application to the skeletonized model of a real 8 network highlights the improved capability of the unsteady flow simulation of RTC compared with the typical extended period simulation 9 (EPS) models. The results show that the unsteady flow model provides sounder description of the amplitude of the pressure head variations at 10 the controlled node. Furthermore, it enables identification of the suitable control time step to be adopted for obtaining a prompt and effective 11 regulation. Nevertheless, EPS-based models allow consistent estimates of leakage reduction as well as proper indications for valve setting 12 under network pressure RTC at a much smaller computational cost.

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Nonreflective Boundary Design via Remote Sensing and Proportional-Integral-Derivative Control Valve

Cited by 3 publications

References 10 publications

Suppressing water hammer of ship steering systems with hydraulic accumulator

Suppressing water hammer of ship steering systems with hydraulic accumulator

Instability of the Tank-Level Control System of Water Mains in Mountainous Environments

Unsteady Flow Modeling of Pressure Real-Time Control in Water Distribution Networks

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