Throttling components effect on aerodynamic performance of superheated steam flow in multi-stage high pressure reducing valve

Chen, F.; Jin, Zhi-jiang

doi:10.1016/j.energy.2021.120769

Cited by 22 publications

(4 citation statements)

References 29 publications

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“…The deformation of the valve core is closely related to the heat load applied by the fluid, which cannot be ignored when calculating the strength of the valve structure [16,17].…”

Section: Influence Of Thermal Load On Spool Deformationmentioning

confidence: 99%

“…The deformation of the valve core is closely related to the heat load applied by the fluid, which cannot be ignored when calculating the strength of the valve structure [16,17]. To quantitatively study the influence amplitude of the heat load, a traditional fluid-solid coupling simulation (F-S) was adopted for the model without heat transfer.…”

Section: Influence Of Thermal Load On Spool Deformationmentioning

confidence: 99%

See 1 more Smart Citation

A Thermal Fluid–Solid Coupling Simulation of Gas Fuel Control Valves for High-Precision Gas Turbines

Pan

Luo

et al. 2023

Aerospace

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Gas fuel control valves play important roles in the control of gas flow in high-precision gas turbines. To clarify the influence of coupling between the structure and the fluid system, a thermal fluid–solid coupling mechanism is presented based on numerical investigations carried out using a dynamic mesh technique. Valve core deformation can affect the outlet gas flow accuracy. At 2% valve opening, the gas temperature contributes 93% to the deformation. The effect of deformation on the flow accuracy at 6% valve opening and 4% valve opening is increased by 4.8% and 7.3%, respectively. The fluctuation range of the gas temperature and pressure in front of the valve should be strictly controlled to ensure the high precision and high stability of the outlet flow. These results help to clarify the processes that occur in the valve flow path, leading to the flow control instability observed in the control valve.

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“…The deformation of the valve core is closely related to the heat load applied by the fluid, which cannot be ignored when calculating the strength of the valve structure [16,17].…”

Section: Influence Of Thermal Load On Spool Deformationmentioning

confidence: 99%

Section: Influence Of Thermal Load On Spool Deformationmentioning

confidence: 99%

A Thermal Fluid–Solid Coupling Simulation of Gas Fuel Control Valves for High-Precision Gas Turbines

Pan

Luo

et al. 2023

Aerospace

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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 pressure reducing valve mainly changes the flow area and local resistance by changing the fitting distance of the internal key throttling element to achieve the momentum dissipation and pressure reduction of the fluid medium inside the valve, which is widely applied to petroleum, coal chemical industry, nuclear power, and other process industries. [1][2][3][4] With the modernization of chemical technology and the exacerbation of process parameters, the pressure-reducing valve is facing complex and severe working conditions, such as high temperature, high-pressure difference, and high-speed flow. 5,6 When the fluid medium flows relative to the throttling element inside the valve at high speed, cavitation is easy to occur.…”

Section: Introductionmentioning

confidence: 99%

Experiment and numerical simulation investigation on cavitation evolution and damage in the throttling section of pressure reducing valve

Duan

Wang

et al. 2022

Energy Science & Engineering

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For the phenomenon of widespread and serious cavitation damage in the throttling section of pressure reducing valve under high temperature and high pressure in the chemical technology process of petroleum and coal, according to actual coordination structure widely applied between the valve core and valve seat, the cavitation throttling section with symmetrical contraction and expansion was made, and the visualized cavitation water tunnel experimental apparatus was designed and constructed. The cavitation evolution process with time under different cavitation numbers σ was recorded by the highspeed photography, the variation law of cavitation damage length and area with time was investigated by using aluminum film as cavitation damage carrier. Based on the experimental cavitation characteristic length L*, the evaporation coefficient F v , and condensation coefficient F c in the Zwart-Gerber-Belamri cavitation numerical model were modified, and the cavitation damage region was predicted by the gas phase condensation rate of numerical simulation. The results show that with the decrease of cavitation number, the characteristic length of cavitation strip increases; the cavitation characteristic length fluctuates greatly at σ = 1.22, and there are cavitation cloud periodic formation, shedding, collapse, and disappearance at the tail of the cavitation strip on the upper valve seat; the cavitation damage length of the upper and lower valve seat remains unchanged with time, and the cavitation damage area increases approximately linearly with time; the initial position and length of cavitation damage predicted by the gas phase condensation rate are basically consistent with the experimental results, which verifies the accuracy of the modified numerical simulation.

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Throttling components effect on aerodynamic performance of superheated steam flow in multi-stage high pressure reducing valve

Cited by 22 publications

References 29 publications

A Thermal Fluid–Solid Coupling Simulation of Gas Fuel Control Valves for High-Precision Gas Turbines

A Thermal Fluid–Solid Coupling Simulation of Gas Fuel Control Valves for High-Precision Gas Turbines

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

Experiment and numerical simulation investigation on cavitation evolution and damage in the throttling section of pressure reducing valve

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