The effects of swirl vanes and a vortex stabilizer on the dynamic flow field in a cyclonic separator

Celis, Gustavo Eduardo Oviedo; Loureiro, Juliana; Lage, Paulo L.C.; Freire, Atila P. Silva

doi:10.1016/j.ces.2021.117099

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…In other words, the velocity oscillation is not doing rigid body or rigid body-like motion, showing an obvious nonstationary characteristic. This phenomenon is very similar to the motion of a tornado, which is known as the precession of the vortex core (PVC) in the cyclone separator. − The resulting pressure changes lead to the appearance of bubble subclusters.…”

Section: Resultsmentioning

confidence: 93%

Bubble Formation in a Swirl-Venturi Microbubble Generator

Wang

Shuai

Yang

et al. 2022

Ind. Eng. Chem. Res.

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The enhancement of the bubble evolution and detachment by the swirling liquid field were experimentally investigated with a high-speed camera and particle image velocimetry in this work. The bubble growth process is greatly compressed as the characteristic of the swirling flow field becomes prominent. When the Reynolds number is low, there are three stages the bubble has to experience, while the nucleation stage occurs twice. As the Reynolds number increases, the nucleation stages gradually reduce until they disappear, and the formation stages are also reduced to only one. Further, the bubbles depart with pulsation characteristics at a high Reynolds number, statistics show two periodicities (i.e., bubble cluster and bubble subcluster), and the bubble detachment time shows a bipolar distribution. Overall, the bubble growth is strengthened by the swirling liquid in both size and time, providing a possibility that generates small bubbles using a large diameter orifice.

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Section: Resultsmentioning

confidence: 93%

Bubble Formation in a Swirl-Venturi Microbubble Generator

Wang

Shuai

Yang

et al. 2022

Ind. Eng. Chem. Res.

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“…At the same time, Zhang et al concluded that the separation efficiency can be improved by optimizing the tangential inlet angle. Celis et al , studied the influence of the spiral inlet structure on the performance of hydrocyclones and showed that better spiral inlet structure parameters can improve the separation performance. Some research on the effect of structure on the performance of NGH hydrocyclone has been carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of Spiral Inlet Geometric Parameters on the Performance of Hydrocyclones Used for In Situ Desanding and Natural Gas Hydrate Recovery in the Subsea

Qiu

Wang

et al. 2023

ACS Omega

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The inlet structure of hydrocyclones has great impact on performance. In this paper, the effects of spiral inlet geometric parameters on the flow field characteristics and separation performance were investigated by CFD. Numerical results show that the pitch has the largest influence, followed by the heads, the turns, and the steady flow cone. With the increase of the steady flow cone angle, the turbulence intensity increases. The efficiency, pressure drop, tangential velocity, sand volume fraction at the spigot, and natural gas hydrate (NGH) volume fraction at the vortex finder decrease, when the pitch increases. With the increase of the number of heads and turns, the efficiency, pressure drop, tangential velocity, the NGH volume fraction at the vortex finder, and the sand volume fraction at the spigot increase. The efficiency and pressure drop of hydrocyclones with the optimal parameters are 90% and 0.05 MPa, respectively. Therefore, the performance of the NGH hydrocyclone can be improved by increasing the inlet pitch and the number of spiral heads and inlet spiral turns. The results provide theoretical guidance for the engineering design of NGH in situ separators.

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“…The effect of electrostatic force in ESC was more significant at a lower flue gas flow rate and could substantially reduce the escape of fine particles [23]. The swirl vanes and vortex stabilizer played an important role in the optimization of the catch efficiency of the gas and liquid phases, and the velocity field inside the cyclone separator was investigated to explain the separate effects of the two internal components [24]. The magnetic field can effectively improve the collection efficiency of electrostatic precipitator for particles, which is a method of using the magnetic field to create Lorentz force on charged moving particles to change their movement paths [25][26].…”

Section: Introductionmentioning

confidence: 99%

Influences of magnetic field on the removal of submicron particles in electrostatic cyclone at different temperatures

Zhang

Zhao

et al. 2022

Environmental Engineering Research

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Aiming at improving the capture performance of inner vortex electrostatic cyclone (ESC), which is widely used in the field of flue gas purification, magnetic field is introduced to remove submicron particles. The theoretical and physical models of electromagnetic dust removal were established, and the dust-removal efficiency of submicron particles under different temperatures and magnetic fields was numerically simulated by FLUENT. The results show that a rise in temperature leads to a reduction in the grade efficiency of submicron particles of ESC, a decrease in the number of escaped particles at lower temperature, and the differences of the rising amplitude in overall efficiency corresponding to the traditional cyclone, which were 36.7%, 34.8%, 33.8%, and 31.9% at four temperatures. The contribution of temperature to the capture of submicron particles decreases continuously with the increasing temperature, but that of magnetic field progressively increases at this time. The magnetic field environment is conducive to the capture of submicron particles, the removal effect is more obvious with the increase of magnetic flux density, but the ascended ranges of magnetic field and temperature both decrease when it reaches 0.5 T. These results can provide a theoretical basis and a technical reference for the design of ESC.

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The effects of swirl vanes and a vortex stabilizer on the dynamic flow field in a cyclonic separator

Cited by 19 publications

References 30 publications

Bubble Formation in a Swirl-Venturi Microbubble Generator

Bubble Formation in a Swirl-Venturi Microbubble Generator

Effect of Spiral Inlet Geometric Parameters on the Performance of Hydrocyclones Used for In Situ Desanding and Natural Gas Hydrate Recovery in the Subsea

Influences of magnetic field on the removal of submicron particles in electrostatic cyclone at different temperatures

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