Turbulent compressible flow analysis on multi-stage high pressure reducing valve

Chen, Fu qiang; Qian, Jin; Chen, Min Rui; Zhang, Ming; Chen, Li Long

doi:10.1016/j.flowmeasinst.2018.03.013

Cited by 43 publications

(9 citation statements)

References 41 publications

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“…Although there are no direct experiments about the water vapor flow inside check valves, the methods applied in this study have been proved in other work. Chen et al [39] and Qian et al [40] studied the compressible superheated steam flow in pressure-reducing valves.…”

Section: Numerical Modelmentioning

confidence: 99%

Comparison of Swing and Tilting Check Valves Flowing Compressible Fluids

Gao

Liu²,

Yang³

et al. 2020

Micromachines

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Although check valves have attracted a lot of attention, work has rarely been completed done when there is a compressible working fluid. In this paper, the swing check valve and the tilting check valve flowing high-temperature compressible water vapor are compared. The maximum Mach number under small valve openings, the dynamic opening time, and the hydrodynamic moment acting on the valve disc are chosen to evaluate the difference between the two types of check valves. Results show that the maximum Mach number increases with the decrease in the valve opening and the increase in the mass flow rate, and the Mach number and the pressure difference in the tilting check valve are higher. In the swing check valve, the hydrodynamic moment is higher and the valve opening time is shorter. Furthermore, the valve disc is more stable for the swing check valve, and there is a periodical oscillation of the valve disc in the tilting check valve under a small mass flow rate.

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Section: Numerical Modelmentioning

confidence: 99%

Comparison of Swing and Tilting Check Valves Flowing Compressible Fluids

Gao

Liu²,

Yang³

et al. 2020

Micromachines

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“…During the operation of such a valve, the pressure, velocity, and temperature of the fluid medium change, and the flow field in the valve forms a complex flow with a high degree of turbulence. As an important type of regulating valve, the sleeve regulating valve is widely used in practice (Chen et al 2018;Qian et al 2020;Chen and Jin 2021;Ou et al 2022). Its most important feature is that it has good performance in adjusting the flow and pressure of the internal fluid medium, suppressing cavitation, and reducing vibration and noise under conditions of high pressure difference and high flow rate (Chen et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

2023

JAFM

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The sleeve regulating valve is an important part of a pipeline system and is widely used in the fields of nuclear power and thermal power. In this study, a series of numerical and experimental studies are performed to understand the depressurized flow characteristics inside a new type of multi-layer sleeve regulating valve. In the calculations, the standard k-ԑ turbulence model and the mixture model combined with the Zwart–Gerber–Belamri cavitation model are used to clarify the internal flow and cavitation characteristics in the regulating valve. With the new valve, the results show that when the valve is fully opened, the pressure drop at all levels of the valve is comparatively average (approximately 2–3 MPa for each level) and the fluid velocity in the sleeves at all levels is comparatively uniform at 90 m/s—which can prevent the valve from being eroded by highly changing fluid flow rates, and also offers ideal pressure reduction performance. To reduce the degree of cavitation, it is recommended to adjust the outlet pressure of the valve to 0.7 MPa.

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“…The lower noise and energy consumption of the valve were achieved. Combined with the fluid-structure coupling model of proposed MSHPRV [20], the mathematical model of MSHPRV was established to study the thermo-mechanical stress [21]. And the best strength of MSHPRV is obtained by optimizing geometrical factors [22].…”

Section: Introductionmentioning

confidence: 99%

Evaporation characteristics and efficient working area of multi-stage high pressure and temperature reducing valve

Cao

Dong

et al. 2022

THERM SCI

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A well understanding on the evaporation characteristics and efficient working area of MSHPTRV (multi-stage high pressure and temperature reducing valve) is important for improving the performance and safety of MSHPTRV. The water spraying and evaporation model are integrated into the flow model of MSHPTRV. Compared with the experimental data, the model can show the thermal process well. The flow characteristics and interaction between steam and droplets are presented. On this basis, the increase rate of entropy Sdis is adopted to analyze the thermodynamic loss and innovatively determine the efficient working area of MSHPTRV. The results show that the pressure reducing effect of the second orifice plate is prominent, which accounts for 41.6% of the total pressure drop. The "steam-water layer" is formed at the boundary of steam and water. At the inlet of second orifice plate, the maximum Sdis is 0.782, and the downstream of second orifice plate is the efficient working area of MSHPTRV. The length of evaporation section increases with the droplets diameter significantly.

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Turbulent compressible flow analysis on multi-stage high pressure reducing valve

Cited by 43 publications

References 41 publications

Comparison of Swing and Tilting Check Valves Flowing Compressible Fluids

Comparison of Swing and Tilting Check Valves Flowing Compressible Fluids

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

Evaporation characteristics and efficient working area of multi-stage high pressure and temperature reducing valve

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