CFD-DEM-based Numerical Simulation of Erosion Characteristic of Multistage Pressure Relief String Regulating Valve

doi:10.47176/jafm.15.04.1022

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…To obtain the key factors affecting valve cavitation, Liu et al (2020b), He et al (2019), Ou et al (2022), Yuan et al (2022) and Liu and Yan (2020) analyzed the cavitation development process in the control valve under different inlet pressures, spool angles, openings, etc. and obtained the direct relationship between those variables and cavitation.…”

Section: Introductionmentioning

confidence: 99%

Cavitation characteristics and energy loss in high-pressure differential control valve

Jin

Wen

Wang

et al. 2023

HFF

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Purpose The purpose of this study is to determine the cavitation flow characteristics of the high-pressure differential control valve. The relationship between cavitation, flow coefficient and spool angle is obtained. By analyzing the relationship between different spool angles and energy loss, the energy loss at different spool angles is predicted. Design/methodology/approach A series of numerical simulations were performed to study the cavitation problem of a high-pressure differential control valve using the RNG k–e turbulence model and the Zwart cavitation model. The flow states and energy distribution at different spool angles were analyzed under specific working conditions. Findings The cavitation was the weakest when the spool angle was 120° or the outlet pressure was 8 MPa. The pressure and speed fluctuations of the valve in the throttle section were greater than those at other locations. By calculating the entropy production rate, the reason and location of valve energy loss are analyzed. The energy loss near the throttling section accounts for about 92.7% of the total energy loss. According to the calculated energy loss relationship between different regions of the spool angle, the relationship between any spool angle and energy loss in the [80,120] interval is proposed. Originality/value This study analyzes the cavitation flow characteristics of the high-pressure differential control valve and provides the law of energy loss in the valve through the analysis method of entropy. The relationship between spool angle and energy loss under cavitation is finally proposed. The research results are expected to provide a theoretical basis for the optimal design of valves.

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Section: Introductionmentioning

confidence: 99%

Cavitation characteristics and energy loss in high-pressure differential control valve

Jin

Wen

Wang

et al. 2023

HFF

View full text Add to dashboard Cite

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Dynamic characteristic comparison between pressure fluctuations coupling with a moving part model of a liquid rocket engine flow regulator

Jin,

Shang,

Cai

2024

Physics of Fluids

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The rapid development of space launch vehicle has put forward increasingly strict requirements for engine startup characteristics and thrust regulation capabilities. The flow regulator is a critical component in the operation of liquid rocket engines, particularly due to its role in precise thrust control and self-adaptation to perturbations. This study focuses on the complex fluid–structure interaction phenomena present in liquid rocket engine flow regulators. A three-dimensional (3D) transient numerical model was constructed using computational fluid dynamics and dynamic grid methods to investigate the response mechanism of the regulator under various disturbances. After experimental verification, the model error is less than 3%. The results demonstrate that under sinusoidal pressure perturbations (10–50 Hz), the flow oscillation frequency and amplitude are directly proportional to the perturbation frequency. The amplitude of step pressure perturbations is approximately linearly related to the amount of mass flow rate overshoot. There existed an inverse relationship between vortex size and intensity and the magnitude of inlet perturbations. The characteristics of the flow field are closely coupled with the mass flow rate, and post-perturbation recovery depends on the restoration of the flow field. Furthermore, the existence of friction will cause the sliding sleeve to experience a stagnation phase, and the greater the friction, the longer the stagnation phase. These findings provide valuable insight into the intricate dynamics of liquid rocket engine flow regulators and contribute to the design and optimization of future liquid rocket engines.

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CFD-DEM-based Numerical Simulation of Erosion Characteristic of Multistage Pressure Relief String Regulating Valve

Cited by 2 publications

References 23 publications

Cavitation characteristics and energy loss in high-pressure differential control valve

Cavitation characteristics and energy loss in high-pressure differential control valve

Dynamic characteristic comparison between pressure fluctuations coupling with a moving part model of a liquid rocket engine flow regulator

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