CFD study on the effect of various geometrical parameters of honeycomb type orifices on pressure drop and cavitation characteristics

Mali, Chaitanya R.; Patwardhan, Ashwin W.; Pandey, G.K.; Banerjee, Indranil; Vinod, V.

doi:10.1016/j.nucengdes.2020.110880

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…[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. When the cavitation bubble collapses, it will release huge pulse pressure to impact the material surface of the core throttling element, which will not only reduce valve performance and damage valve structure but also cause the failure of the downstream piping system and seriously restrict the long-term safe operation of the device.…”

Section: Introductionmentioning

confidence: 99%

“…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 1–4 . 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%

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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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Section: Introductionmentioning

confidence: 99%

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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“…They reported that the flow pressure meet the lowest values at the orifice throat and near plate exit and an increase in the number of plates reduces the prospect of cavitation. They presented threshold flow velocity for different geometrical configurations, above which flow is subjected to cavitation [32].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of geometric effect on cavitation flow through orifice

Davoudi

Mahdi

2021

Mechanics & Industry

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Due to the set of factors and conditions, the stream pressure through the orifice decreases, which can lead to the occurrence of the cavitation phenomenon. The most important factor in this regard is the geometry of orifice. In the first part of this study, the flow through two types of single-hole orifice and a multi-hole orifice were experimentally studied. The results showed that the single hole orifice with a two-sided sloped edge caused less pressure drop, which in order to control the cavitation phenomenon is more efficient compared to the single-hole and multi-hole orifices with one-sided sloped edges and the same equal diameter ratio. Additionally, all experiments were simulated in the second part of this research using finite volume methods. Considering the complexity of the problem, several numerical solutions were investigated to approach the experimental results. Finally, it was determined that the type of gridding, turbulence method, and cavitation model have a great influence on the accuracy of the obtained numerical results.

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Application of hydrodynamic cavitation in the field of water treatment

2023

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CFD study on the effect of various geometrical parameters of honeycomb type orifices on pressure drop and cavitation characteristics

Cited by 9 publications

References 36 publications

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

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

Experimental and numerical investigation of geometric effect on cavitation flow through orifice

Application of hydrodynamic cavitation in the field of water treatment

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