Effects of the inlet angle on the flow pattern and pressure drop of a cyclone with helical-roof inlet

Misiulia, Dzmitry; Andersson, Anders G.; Lundström, T. Staffan

doi:10.1016/j.cherd.2015.06.036

Cited by 94 publications

(46 citation statements)

References 44 publications

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“…The turbulent flow was numerically solved with an LES methodology that is appropriate when solving large‐scale unsteady behavior of complex turbulent flows. The approach has been used, e.g., in many studies on highly swirling flow in cyclone separators .…”

Section: Governing Equationsmentioning

confidence: 99%

“…The main goal of this work is to reveal the effects of the deswirler of original design on the flow field and cyclone performance using large eddy simulations (LES). This goal has been achieved by predicting the flow field, pressure drop, and collection efficiency in a cyclone fitted with a deswirler and comparing the obtained results with the previous results of numerical investigation of the conventional cyclone without a deswirler , .…”

Section: Introductionmentioning

confidence: 99%

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Large Eddy Simulation Investigation of an Industrial Cyclone Separator Fitted with a Pressure Recovery Deswirler

2017

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A cyclone fitted with a deswirler of original design has been investigated by means of large eddy simulation. Installation of the deswirler reduces significantly the positive static pressure near the wall as well as the negative static pressure in the central region. It also decreases the maximum tangential velocities in the main separation zone. The deswirler enables a substantial reduction of the backward flow at the gas outlet and a more uniform distribution of the axial velocities at the gas outlet. It also considerably reduces pressure losses in the vortex finder lowering the cyclone pressure drop by almost about one third but it deteriorates the collection efficiency of particles with diameters of less than 8 mm, thus increasing the cut size.

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Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation Investigation of an Industrial Cyclone Separator Fitted with a Pressure Recovery Deswirler

2017

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“…Many studies had been performed for cyclones. Elsayed et al investigated the effect of inlet dimensions of cyclone (inlet width and inlet height) on separation performance and flow‐field pattern using the Reynolds stress turbulence model.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicate that there is a significant consistency between the changing trends of the maximum‐efficiency cyclone height and the natural vortex length. The inlet angle has an important effect on cyclone performance . For a conventional separator, Qian and Bernardo showed that inlet section angle made flow field in cyclone propitious for particle separation, which improved separation performance effectively, and the optimal inlet section angle should be 45°.…”

Section: Introductionmentioning

confidence: 99%

“…For a conventional separator, Qian and Bernardo showed that inlet section angle made flow field in cyclone propitious for particle separation, which improved separation performance effectively, and the optimal inlet section angle should be 45°. But for a cyclone with helical‐roof inlet, Misiulia et al indicated that increasing the inlet angle would decrease pressure drop and cyclone collection. Compared with cyclones with tangential inlets, cyclones with helical‐roof inlets had a higher aerodynamic efficiency, and the highest aerodynamic efficiency was reached with an inlet angle of 20°.…”

Section: Introductionmentioning

confidence: 99%

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The effect of inlet shape on separation performance and flow‐field characteristics in a gas–solid cyclone separator

Wei

Sun

Jiao

et al. 2019

Asia-Pacific J Chem Eng

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The gas-solid separation experiments were conducted to compare separation performance between cyclone separators with different inlet shapes. Besides, the Reynolds stress model was employed to simulate flow field in different cyclones. The results revealed that the cyclone with a trapezoidal inlet could enhance separation efficiency without almost increasing pressure drop. Compared with the conventional rectangular inlet, a trapezoidal inlet had negligible effect on flow field of cyclone's separation space, and it reduced lip flow and upper dust ring of cyclone. In addition, the cyclone with a trapezoidal inlet could improve the inhomogeneous gas flux distribution at the inlet, which was the root reason why secondary flows in cyclone were inhibited and separation efficiency was enhanced.

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Numerical Investigation of Cyclone Separators: Physical Mechanisms and Theoretical Algorithms

El‐Emam,

Zhou,

Yasser

2024

ChemBioEng Reviews

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Gas‐particle aero‐type cyclones have revolutionized biochemical processes, engineering industries, and environmental pollution protection by effectively separating particles from gas. These devices rely on gravitational energy and centrifugal force to dissipate particle phase energy, but achieving optimal energy efficiency while minimizing pressure drop remains challenging. This has led to the development of various cyclone designs in commercial industries, each with unique energy efficiency characteristics. The intricate gas‐particle flow inside cyclones is a critical issue impacted by cyclone geometry, operating conditions, and media parameters. Advanced numerical simulations have been employed to understand this complex flow pattern better, offering researchers valuable insights into the mechanisms of different cyclone separators. This comprehensive review explores the available numerical methods in the literature on cyclones and their corresponding validations. Computational numerical modeling is a promising technique for predicting cyclone energy efficiency, gas‐particle behavior, and overall performance. This investigation delves into the progress and numerical forms of gas‐particle flow cyclones, examining how different parameters impact cyclone performance and flow patterns within the two‐phase flow. The future developments and challenges that may further promote the development of aero‐type cyclone separators, providing theory and engineering support for future cyclone designs, are also covered. As a result, it can confidently be reported that aero‐type cyclone separators remain a critical component in various industrial sectors, offering energy‐efficient solutions for mitigating environmental pollutants and gas‐particle separation systems. With continued development and research, these devices will undoubtedly shape the future of energy processes and engineering industries, ushering in a new era of sustainability and efficiency.

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Effects of the inlet angle on the flow pattern and pressure drop of a cyclone with helical-roof inlet

Cited by 94 publications

References 44 publications

Large Eddy Simulation Investigation of an Industrial Cyclone Separator Fitted with a Pressure Recovery Deswirler

Large Eddy Simulation Investigation of an Industrial Cyclone Separator Fitted with a Pressure Recovery Deswirler

The effect of inlet shape on separation performance and flow‐field characteristics in a gas–solid cyclone separator

Numerical Investigation of Cyclone Separators: Physical Mechanisms and Theoretical Algorithms

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