CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump

Xu, Kai; Wang, Gang; Wang, Liquan; Yun, Feihong; Sun, Wenhao; Wang, Xiangyu; Chen, Xi

doi:10.3390/pr8020133

Cited by 15 publications

(4 citation statements)

References 23 publications

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“…Other physical effects are often included, such as chemical reaction and combustion, multiphase flow, free-surface flow, etc. The challenges are both numerical and physical, and several reviews have focused on specific industrial applications or areas of physics [5,7,[11][12][13][14].…”

mentioning

confidence: 99%

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

González-Durán¹,

Zamora-Antuñano

Lira-Cortes³

et al. 2020

Processes

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This paper focuses on the numerical modeling of the effect of the height of a combustion chamber on the development of a reference calorimeter whose objective is to measure the calorific value of natural gas. The impacts of temperature, velocity, and mass fraction on the exhaust gases were evaluated by varying the height of the combustion chamber. The eddy dissipation concept (EDC) approach was used to model combustion with two different chemical kinetic mechanisms: one with three steps, called the three-step mechanism defined by default in the software used, and second skeletal model, which consists of 41 steps, through the ChemKin-import file with 16 species. The main result of this study is the selection of a combustion chamber height for the reference calorimeter that produces the best performance in the combustion process, which is 70 mm, as well as the main differences in using a three-step mechanism and a skeletal model to simulate an oxy-fuel combustion reaction.

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mentioning

confidence: 99%

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

González-Durán¹,

Zamora-Antuñano

Lira-Cortes³

et al. 2020

Processes

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“…And the efficient injector performance is the key to determine the instant utilization of ice particles and the effect of jet surface treatment. Injector technology is a widely used jetting method for abrasive jets, which can effectively elicit and mix fluid-solid mixtures 19,20 . Xiong Yuanquan et al 21 obtained the static pressure distribution inside the injector by means of simulation, and found that the position of the working nozzle affects the magnitude of the static pressure inside the gas-solid injector, which in turn affects the priming rate of the abrasive.…”

Section: Introductionmentioning

confidence: 99%

Study on the key parameters of ice particle air jet ejector structure

Man,

Zehua,

LIU

2024

Preprint

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The existing ice particle jet surface treatment technology is prone to ice particle adhesion during application, which seriously affects the surface treatment efficiency. Based on the basic structure of the jet pump, the ice particle air jet surface treatment technology is proposed for the instant preparation and utilization of ice particles, which solves the problem of ice particle adhesion and clogging. In order to realize the efficient utilization of ice particles and the high-speed jetting of ice air jet, the integrated jet structure of ice particle ejection and acceleration was developed. The influence of the working nozzle position (Ld), expansion ratio (n) and acceleration nozzle diameter ratio (Dn), length-to-diameter ratio (Ln) on the ice particle ejection and acceleration was systematically studied, and the structural parameters of the injector were determined with the impact kinetic energy of ice particles as the comprehensive evaluation index, and the surface treatment test was carried out to verify the results. The results of the study show that: under 2 MPa air pressure, the ejector nozzle parameters of n = 1.5, Dn=4.0, Ld=4, Ln=0 mm, can be sufficiently ejected to accelerate the ice particles. The structure parameters of the aluminum alloy plate depainting test, can obtain a larger radius of paint removal and make the aluminum alloy plate surface smoother, aluminum alloy surface roughness from 3.194 ± 0.489 m to 1.156 ± 0.136 m. The immediate preparation and utilization of ice particles, solved the problem of ice particles in the engineering application of air jet technology, ice particles bonding and storage problems. The instantaneous preparation and utilization of ice particles solves the problems of ice particle adhesion and storage in the engineering application of ice particle air jet technology, and can provide a feasible technical method in the field of material surface treatment.

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“…Computational fluid dynamics (CFD) simulation has been widely used in the study of jet flow, and numerical simulation provides theoretical support to facilitate engineering applications. The k-ε turbulence models made more contributions to studying the largescale vortices caused the jet flow [11][12][13]. However, the changes in small-scale vortices with time cannot be studied in depth.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet

Gong,

Jian,

Zhang

et al. 2024

Processes

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The centrifugal force field in a hydrocyclone was affected by the concave-wall curvature radius R0, and the mechanism underlying droplet deformation was closely related to the mass transfer efficiency. Numerical simulation and experimental data were collected to reveal the deformation characteristics and mechanism of a single droplet crossing concave-wall jet. Normalized interfacial energy γ and stretching performance were provided to investigate the droplet deformation process. The results showed that the droplet was stretched along the streamwise direction and shrank along the spanwise direction in the concave-wall jet. The droplet interfacial energy and deformation were the largest when the droplet crossed the jet boundary at t = 0.20 s. The maximum γ value increased with the increase in R0 by 57.3% to 71.4%, and the distance between the droplet and concave wall increased with R0. The Q-criterion was exported to show the increase in the vortex strength with the decrease in R0 at the jet boundary. The pressure distribution inside the droplet showed that the pressure decreased as R0 increased, while the pressure difference increased along the streamwise and wall-normal directions. This study suggested that the droplet breakup was more difficult for a smaller R0, which was beneficial for liquid–liquid heterogeneous separation.

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CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump

Cited by 15 publications

References 23 publications

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

Study on the key parameters of ice particle air jet ejector structure

Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet

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