Numerical Study on Cavitation Occurrence in Globe Valve

Chern, Ming‐Jyh; Hsu, Ping-Huang; Cheng, Yeuan-Jong; Tseng, Po-Yi; Hu, Changming

doi:10.1061/(asce)ey.1943-7897.0000084

Cited by 43 publications

(31 citation statements)

References 14 publications

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“…Foreign research on energysaving valves started relatively early. As early as around 1960, foreign scholars began to explore the flow and cavitation characteristics of valves [9][10][11][12][13][14][15][16]. Pountney D C [12] and other scholars used the k-e turbulence model to determine the flow characteristics of the orifice valve and proposed a comparable experimental study.…”

Section: Research Status Of Energy Dissipation Valvementioning

confidence: 99%

“…Pountney D C [12] and other scholars used the k-e turbulence model to determine the flow characteristics of the orifice valve and proposed a comparable experimental study. Chern M J [14] and other scholars have prevented the generation of cavitation by changing the structure of the suction valve. At the same time, it is proposed that the cavitation type can be used for cavitation prediction of other control valves.…”

Section: Research Status Of Energy Dissipation Valvementioning

confidence: 99%

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Numerical Simulation of Flow Field of DN2400 Hedge Dissipator

Tan

Sun

Liao³

et al. 2018

MATEC Web Conf.

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The distribution of water resources in China is uneven. Long distance water conveyance projects have effectively solved this problem. In the water delivery system, the energy dissipator plays an important role in pressure regulation and regulation. Therefore, the design and structure of the energy dissipator affect the working efficiency and stable operation of the whole water delivery system, and it is of great significance to study the internal flow field of the energy dissipator. Based on a emergency project, this paper studies the internal flow field of the energy dissipation valve in A location and B location in the design conditions, accident conditions and water separation conditions to verify the DN2400 hedging energy dissipation. The rationality of the structural design of the device provides a reference for the design and improvement of the energy dissipator in the future.

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Section: Research Status Of Energy Dissipation Valvementioning

confidence: 99%

Section: Research Status Of Energy Dissipation Valvementioning

confidence: 99%

Numerical Simulation of Flow Field of DN2400 Hedge Dissipator

Tan

Sun

Liao³

et al. 2018

MATEC Web Conf.

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show abstract

“…From Table 2, it can be seen that our simulation results of pressure difference have the same order of magnitude under the valve core displacement from 5 mm to 25 mm. To further improve reliability, we also compare PCGV with another globe valve (Chern et al, 2013). In the grid independency test of various meshes, Chern et al (2013) also chose the pressure difference as the judgment parameter, ranging from 17.3 kPa to 21.3 kPa under similar conditions.…”

Section: Comparison With Similar Simulationsmentioning

confidence: 99%

“…To further improve reliability, we also compare PCGV with another globe valve (Chern et al, 2013). In the grid independency test of various meshes, Chern et al (2013) also chose the pressure difference as the judgment parameter, ranging from 17.3 kPa to 21.3 kPa under similar conditions. Moreover, in a control valve (Palau-Salvador et al, 2008), with similar inlet velocities, they found that the pressure different inside changes from 0.2 MPa to 1.4 MPa.…”

Section: Comparison With Similar Simulationsmentioning

confidence: 99%

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Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements

Qian

Jin

2016

JZUS-A

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Abstract:The pilot-control globe valve (PCGV) is a novel globe valve with a piston-type valve core and a small pilot valve. It can utilize a pressure difference to control the state of the main valve by the pilot valve. In this paper, a mathematical model of PCGV is established and a computational fluid dynamics (CFD) method is used to numerically simulate its flow and cavitation characteristics. Analysis of the pressure difference between the upside and downside of the valve core and comparison with similar previous work increase the reliability of the simulation. Then an analysis of flow and cavitation characteristics is carried out with three comparisons: a comparison between opened and closed states, a comparison between different inlet velocities, and a comparison between different valve core displacements. The results demonstrate that the vapor volume fraction reaches its peak point at the valve seat near the outlet tube, and that a higher inlet velocity or smaller valve core displacement can cause greater cavitation damage. This study can help further design work for optimization and engineering applications of PCGV.

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