Design Strategy of a High Pressure Regulator

Shahani, A.R.; Aryaei, Ashkan; Najar, M.; Mohammadi, S.; Esmaili, Hamid

doi:10.1115/esda2010-25197

Cited by 4 publications

(5 citation statements)

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“…Equation (6) shows that the outlet pressure P out is calculated by L v , and Q v . Equations (7) - (9) indicate that the spring stiffness K s and pre-stressed spring length L 0 are determined by L v , and F. However, the value of L v in a certain inlet pressure cannot be obtained directly from the experiment. Hence, a series of discrete models at different displacements are established, and then the F-L v curve is fitted with the CFD results at different positions.…”

Section: Governing Equations and Turbulence Modelsmentioning

confidence: 99%

“…The lift force coefficient of the valve at several fixed lifts was calculated using the static CFD analysis and was then imported into the dynamic model as the inherent characteristic of the valve to predict the plug lift during the reclosing process. Shahani et al [9] performed dynamic simulation models to analyze the regulator performance of a high pressure regulator. The regulator behavior consist of the output pressure change versus time, the displacement of the moving parts versus time, and the regulator mass flow rate versus time were obtained.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Regulating Performance of Direct-Operated Pressure Regulator for a Microirrigation Lateral

Zhang

2015

Computer and Computing Technologies in Agriculture VIII

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A lateral inlet direct-operated pressure regulator is a novel device for microirrigation system that ensures the equal operating pressure of the lateral inlet required for high uniformity. This study develops a computational fluid dynamics (CFD) model in combination with inlet pressure and regulation assembly displacement to analyze the outlet pressure of the pressure regulator. The model is validated by a comparison of experimental measurements, and the predicted results show good agreement. The effects of the regulation assembly displacement and geometrical structure (regulation assembly inlet height) on regulating performance are investigated. Results show that the magnitude of the regulation assembly movement affecting by inlet pressure, preset pressure, and flow rate significantly changes in the beginning of the regulation range and then changes slowly. The spring parameters can be designed according to the force-displacement characteristic (the F-L v curve) of the T-shape regulating plunger. A greater regulation assembly inlet height corresponds to a lower preset pressure and less sensitivity of pressure loss to the movement of the regulation assembly. The pressure distribution through the regulator provides an improved understanding of the pressure difference in the regulating plunger with various displacements. The CFD model can reflect the motion characteristics of the regulation assembly and reveal the key factor of the regulator design. The results form the sound basis for future design and performance optimization of pressure regulator.

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Section: Governing Equations and Turbulence Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Regulating Performance of Direct-Operated Pressure Regulator for a Microirrigation Lateral

Zhang

2015

Computer and Computing Technologies in Agriculture VIII

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“…Previous studies focused on mechanical pressure regulators, [12][13][14][15] or only solenoid injectors, [16][17][18][19] while EPR has rarely been mentioned. An experimental investigation was conducted by Ehsan 20 showed the influence of 1 School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam the spark timing on a spark ignition gas fueled engine, in which a solenoid pressure regulator was performed to shut-off gas supplied to the engine.…”

Section: Introductionmentioning

confidence: 99%

Influences of key design parameters to operating performance of a compressed natural gas injection system using solenoid pressure regulator

Hung

2023

International Journal of Engine Research

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A study is carried out to examine the effects of design parameters on operating performance of a compressed natural gas (CNG) injection system. This system consists of a solenoid-type injector, a solenoid pressure regulator, and a rail tube. To depict the operation of the injection system, mathematical models are built, including electrical and mechanical models of a solenoid pressure regulator and a solenoid injector. To control rail tube gas pressure, a control model is built using proportional integral derivative (PID) algorithm. The simulated gas pressure is compared with experimental result for validating the mathematical models. The influences of design parameters, including rail tube volume, stiffness of spring, and number of coil turns in the solenoid pressure regulator, on the operating performance of the CNG system are examined. The simulation results indicate that the stability of controlled gas pressure is increased when increasing the volume of the rail tube and spring stiffness. Besides, by decreasing the number of coil turns in the solenoid pressure regulator, the stability of controlled gas pressure and flow rate of the injection is increased.

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“…The combination of the EPR with a fuel injection system using gaseous fuels such as hydrogen and compressed natural gas (CNG) is considered a good solution to further improve engine performance and reduce exhaust emissions due to the benefits of these gaseous fuels. 1–5 Previous studies usually mention normal pressure regulators using mechanical mechanisms 6–10 while there are very few studies mentioned about the EPR used for the fuel injection systems as well as natural gas-fueled engines. An experimental study for the effect of spark advance on a natural gas-fueled SI engine was conducted by Ehsan, 11 in which a pressure regulator integrated with a solenoid valve was used to shut off gas supply to the engine.…”

Section: Introductionmentioning

confidence: 99%

Effects of working conditions on the operating characteristics of an injection system applied on CNG fueled vehicles

Hung

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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A model-based study is conducted to examine the operating characteristics of an injection system applied on CNG fueled vehicles. This injection system is a combination of an electric pressure regulator, a rail tube, and a solenoid injector. The electric pressure regulator has a great potential to be widely used in injection systems of natural gas-fueled engines due to its flexible operation, which can help to improve the engine performance and reduce emission. This paper presents a simulation study using mathematical models to describe and analyze the operating characteristics of the gaseous fuel injection system, in which models of electric pressure regulator, solenoid fuel injector, and control model for electric pressure regulator are presented. The simulation results are compared with experimental data to validate the simulation models. Effects of working conditions, including coil resistance of the electric pressure regulator, inlet gas pressure, and set pressure in the rail tube, on the operating characteristics of the gaseous fuel injection system are investigated. Simulation results show that when the coil resistance of the electric pressure regulator is increased from 3.1 Ω to 4.1 Ω, the maximum fluctuation of the controlled gas pressure in the rail tube is reduced from 0.017 to 0.012 MPa, respectively. By decreasing the inlet gas pressure of the electric pressure regulator from 2.5 to 2.3 MPa, the controlled gas pressure in the rail tube is more stable with the maximum fluctuation significantly reduced from 0.012 to 0.002 MPa, respectively, which leads to stability in injection flow rate. The increase of set pressure in the rail tube from 0.5 to 0.7 MPa can help to improve the stability of the controlled gas pressure in the rail tube with the maximum fluctuation respectively reduced from 0.002 to 0.001 MPa.

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Design Strategy of a High Pressure Regulator

Cited by 4 publications

References 0 publications

Numerical Simulation of Regulating Performance of Direct-Operated Pressure Regulator for a Microirrigation Lateral

Numerical Simulation of Regulating Performance of Direct-Operated Pressure Regulator for a Microirrigation Lateral

Influences of key design parameters to operating performance of a compressed natural gas injection system using solenoid pressure regulator

Effects of working conditions on the operating characteristics of an injection system applied on CNG fueled vehicles

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