Numerical simulation ultrahigh waterjet (WJ) flow field with the high-frequency velocity vibration at the nozzle inlet

Hou, Rongguo; Huang, Chuanzhen; Zhu, Hongtao

doi:10.1007/s00170-013-5493-9

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…The air-mixing process transports the polymer powder by gas and ejects water through a nozzle. 43 After the gas, water, and polymer powder are mixed, then they are sent to a stirring tank for agitation. We simulate the gas–liquid–solid three-phase flow in the mixing head to obtain the required parameters, which are the main components of the air-mixing process.…”

Section: Results and Discussionmentioning

confidence: 99%

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Numerical Simulation of Polymer Dispersion Systems for Polymer Injection on Offshore Platforms

Wang

et al. 2020

ACS Omega

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Because of the limited space and high cost of offshore platforms, the dispersion and dissolution of the polymer are required to be of high efficiency, which is essential for polymer injection to enhance hydrocarbon recovery. The numerical simulation models of the water–powder mixing process by Venturi jetting and air-mixing were established. The multiphase flow fields in the water jet ejector, water–powder mixing head, and stirring tank were numerically simulated by FLUENT. Then, the distributions of velocity, volume fraction, pressure, and turbulent kinetic energy of each phase were obtained to evaluate the effects of polymer dispersion and the dissolution of the two mixing methods. According to the maximum velocity of the mixture at the Venturi jet, the optimized length of the throat is 25 mm in our models. The results of the air-mixing process show that a 120° angle of support rods has the best effect of water–powder mixing. The results of the present study show that compared with air-mixing, the combination of Venturi jet and the stirring tank can obtain a broader agitation range and more extensive effect on the flow field, which could uniformly disperse the polymer powder into water. This study has a guiding significance for the design of the onsite polymer injection process.

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Section: Results and Discussionmentioning

confidence: 99%

“…The air-mixing process transports the polymer powder by gas and ejects water through a nozzle . After the gas, water, and polymer powder are mixed, then they are sent to a stirring tank for agitation.…”

Section: Results and Discussionmentioning

confidence: 99%

Numerical Simulation of Polymer Dispersion Systems for Polymer Injection on Offshore Platforms

Wang

et al. 2020

ACS Omega

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“…Their findings demonstrate that employing LES methodology enables accurate prediction of the temporal development of a human cough jet. Hou et al [22] investigated the flow field of an ultrahigh-pressure waterjet (WJ) with high-frequency velocity vibration at the nozzle inlet using computational fluid dynamics. They successfully obtained the velocity field inside the nozzle and examined how various vibration parameters, such as amplitude and frequency, affect the flow field.…”

Section: Introductionmentioning

confidence: 99%

Vortex of a Symmetric Jet Structure in a Natural Gas Pipeline via Proper Orthogonal Decomposition

Li,

Lu,

Zhao

et al. 2024

Processes

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The impact of particle addition jets on the flow field in natural gas pipelines was investigated, and the structural information of the flow field at different flow velocities in a symmetric jet flow was analyzed via numerical simulation. The results of coherent structures in the high-pressure natural gas pipeline reveal vortex structures of varying sizes both upstream and downstream of the jet flow. To determine the spatial distribution of the main vortex structures in the flow field, proper orthogonal decomposition (POD) mode analysis was performed on the unsteady numerical results. Moreover, the detailed spatial characteristics of the coherent vortex structures represented by each mode were obtained. The results indicate that the large-scale vortex structures within the pipeline are balanced and stable, with their energy increasing as the jet flow velocity increases. Additionally, higher-order modes exhibit significant shedding of small-scale vortex structures downstream of the jet flow. In this research, coherent structures present in symmetric particle addition jets are provided, offering theoretical support for future investigations on the distribution of particle image velocimetry (PIV) flowmeters.

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“…At present, the effects of the parameters such as the abrasive concentration, abrasive diameter, abrasive type, stand-off distance, and jet pressure on rock fragmentation have been studied [22][23][24]. Nevertheless, the nozzle is the core of the AWJ system, and the structure change inside the nozzle chamber inevitably leads to the change of the flow field, which greatly affects the dynamic properties of an AWJ [25,26]. In particular, the diameter of the nozzle (d), the convergence angle of the nozzle (α), and the cavity length (L) have an important influence on the fluid velocity inside the nozzle [27].…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism and Effect of Nozzle Parameters on Abrasive Water Jet Rock Breaking

Zhu

2021

Shock and Vibration

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Abrasive Water Jet (AWJ) technology has vast application prospects in the assisted drill-blasting of tunnel excavation, with the advantages of fast-breaking speed, low tool wear, less dust, and good mobility. Nevertheless, AWJ technology has some limitations and shortcomings, such as the small effective fracturing range and parameter mismatch, which influence the fracturing effect of AWJ. To solve the abovementioned issues, it is necessary to study the failure mechanism of rock impacted by AWJ and nozzle parameter effects on rock fragmentation. Based on the coupling algorithm of Smooth Particle Hydrodynamics and Finite Element Method (SPH-FEM), in this research, the numerical model of AWJ impacting rock was established, and the result was verified with Computed Tomography (CT) scanning after the AWJ impacting rock experiment and image processing technology. Through the analysis of the stress characteristics of typical particles in the rock model at different stages and positions, the formation and expansion mechanisms of the crater and the cracks were revealed. Additionally, in this research, the comprehensive damage factor of rock (X) representing the fragmentation degree was defined. By comparatively analyzing X-values with certain technical parameters of AWJ, the importance ranking of the nozzle parameters, the effect of each nozzle parameter on the rock fragmentation, and the optimal parameter combination were also investigated.

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Numerical simulation ultrahigh waterjet (WJ) flow field with the high-frequency velocity vibration at the nozzle inlet

Cited by 15 publications

References 9 publications

Numerical Simulation of Polymer Dispersion Systems for Polymer Injection on Offshore Platforms

Numerical Simulation of Polymer Dispersion Systems for Polymer Injection on Offshore Platforms

Vortex of a Symmetric Jet Structure in a Natural Gas Pipeline via Proper Orthogonal Decomposition

Failure Mechanism and Effect of Nozzle Parameters on Abrasive Water Jet Rock Breaking

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