Effect of the opening of a butterfly valve on the dynamic evolution of cavitation

Zhang, Guang; Wu, Ze Yong; Wu, Ke Xin; Ou, Yu Qiong; Kim, Heuy Dong; Lin, Zhe

doi:10.1007/s12206-022-0623-7

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…They compared the results under cavitation and no-cavitation conditions and then analyzed the transient pressure fluctuation across a spectrum. Zhang et al [20] studied the flow field in a conical throttle valve group with different opening degrees, inlet pressures, and outlet back pressures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Zhang,

Hu,

Yin

et al. 2024

Processes

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Butterfly valves are widely used in the pipeline transportation industry due to their safety and reliability, as well as their low manufacturing and operation costs. Cavitation is a common phenomenon in the butterfly valve that can lead to serious damage to a valve’s components. Therefore, it is important to investigate the generation and evolution of cavitation in butterfly valves. In this study, LES and the Zwart model were used as the turbulence and cavitation models, respectively, to simulate cavitation through a butterfly valve. The influence of the valve opening degree and inlet flow velocity on dynamic cavitation through the butterfly valve were studied. Furthermore, the cavitated flow field was examined, along with the performance coefficients of the butterfly valve. With the increase in the incoming flow velocity, the high-speed jet zone over a large-range and low-pressure zone appeared inside the downstream of butterfly valve, which affected its stability and the cavitation generation through the valve. Furthermore, the flow coefficient decreased with the increase in vapor volume. In addition, the results indicated that cavitation was more easily induced for smaller valve opening degrees, and the interaction between cavitation and solid walls was stronger. Due to the existence of cavitation, the flow characteristics of butterfly valves are seriously affected.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Zhang,

Hu,

Yin

et al. 2024

Processes

Self Cite

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“…Under normal operating conditions, the isolation valves remain open. Usually, they need to be turned off for safety reasons or in certain special cases, such as maintaining or repairing the system [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Increasing Energy Efficiency and Flow Coefficient by Determining Fluid Behaviours with Computer Aided Design and CFD Analysis in Isolation Valves

Ozkan¹

2023

Preprint

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In this study, it was aimed to convey theoretical and practical development of the double eccentric butterfly valve, which would be the first in the sector, with highly efficient, saves energy, has a long life, and requires less maintenance. For this purpose, a prototype with lower weight and higher flow coefficient has been developed by the Computational Fluid Dynamics (CFD) method. Thanks to the use of computer aided design and simulation techniques, environmentally friendly and highly efficient valves have been produced, improving competitive conditions and an innovative product has been obtained in the sector. The design, CFD analysis, and casting simulation were carried out by Solidworks, ANSYS, and Anycasting computer programs respectively. At the same time, as a result of this study, a design suitable for an innovative production technique that leads to less energy and less waste has been obtained. Innovative material selection and casting techniques were used by optimizing the total material weight and valve cost.

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“…As bubbles move from a low-pressure location to a high-pressure area, they compress and burst, and the energy released when the bubbles burst creates noise and vibration [2][3][4][5]. Hydraulic system noise is classified as fluid noise, cavitation noise, and mechanical noise [6], of which cavitation phenomenon generates cavitation noise [7]. Because of its high sound level and high radiation efficiency, noise generated by cavitation bubble collapse is a key noise source for hydraulic valves [8], and its noise creation is strongly tied to the cavitation phenomena.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Observation and Noise Characteristics in Rectangular Throttling Groove Spool

Zhang,

Fu,

Zhang

et al. 2023

Processes

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A hydraulic cavitation platform was developed in order to examine the occurrence of cavitation in the rectangular throttling groove spool and its correlation with noise characteristics. The test valve is constructed using PMMA material, which possesses excellent transparency. This transparency enables direct visual examination of cavitation occurring at the throttle slot. Additionally, high-speed photography is employed to observe the flow characteristics of the valve port, facilitating the analysis of cavitation morphology changes. Furthermore, a noise meter is utilized to measure and record the noise level and its corresponding spectrum. The flow field and flow phenomena at the rectangular throttling groove spool were studied using high-speed photography, noise spectrum analysis, and other methods. It is discovered that back pressure has the greatest influence on cavitation and flow separation, followed by the influence of intake pressure on cavitation morphology and noise. As the back pressure lowers, the cavitation morphology changes from flaky to cloudy, and the cavitation intensity, distribution area, and noise level increase. Background noise and cavitation noise have distinct frequency differences; cavitation noise in the rectangular throttling groove spool is high-frequency noise, with a frequency of more than 8 kHz, and the higher the frequency, the greater the difference in noise value. The magnitude of the alterations in noise intensity is minimal. The noise values exhibit slight variations of 2.3 dB, 4 dB, and 4.3 dB under varying back pressure circumstances of 3 MPa, 4 MPa, and 5 MPa inlet pressure, respectively. It is recommended to use the frequency of cavitation noise to detect the cavitation state and monitor the cavitation process. In the low-frequency region, the cavitation noise in the rectangular throttle groove valve core is not significantly different. Once the center frequency surpasses 3.15 kHz, a discernible distinction emerges, with the magnitude of the discrepancy in noise value increasing as the frequency rises. In other words, the cavitation cloud does not pulsate at one single frequency, but rather in a range of relatively high frequencies (more than 3.15 kHz).

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Effect of the opening of a butterfly valve on the dynamic evolution of cavitation

Cited by 12 publications

References 26 publications

Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Numerical Study of Cavitation Characteristics through Butterfly Valve under Different Regulation Conditions

Increasing Energy Efficiency and Flow Coefficient by Determining Fluid Behaviours with Computer Aided Design and CFD Analysis in Isolation Valves

Cavitation Observation and Noise Characteristics in Rectangular Throttling Groove Spool

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