Effect of inlet volute wrap angle on the flow field and performance of double inlet gas cyclones

Wang, Zetao; Sun, Guogang; Song, Zhengyuan; Yuan, Shiwei; Qian, Zhen

doi:10.1016/j.partic.2022.08.006

Cited by 20 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7,83 The comparison between the experimental and simulation results of the cyclone is shown in Figure 6, which qualitatively agrees with the trends reported in the literature and confirms our model's accuracy. 49 In addition, as shown in the figures mentioned in the Results section, the particles can reach their macroscopically steady state at the bottom of the cyclone after 2 s of simulation time, which is confidently consistent with the literature. 47,154 However, slight deviations, which are in the accepted limits of 1.26, 1.94, and 5%, were observed in separation and cleaning efficiencies and effectiveness, resulting from the assumptions of the simulation methodology.…”

Section: Numerical Simulation Analysissupporting

confidence: 90%

“…44−48 In light of this, the RSM is highly recommended for more accurate predictions of velocity fluctuation profiles and collection efficiency in cyclone separators. 31,32,49,50 On the other hand, understanding particle phase behavior and separation processes in cyclones requires sophisticated models that accurately capture the complex interplay between gas and particle dynamics. The Lagrangian particle tracking model (LPT), 51,52 the discrete phase method (DPM), 53−56 and the discrete element method (DEM) 47,57−59 are all viable options, with DEM being the most reliable for particle behavior modeling.…”

Section: Lapple Cyclonementioning

confidence: 99%

“…As the realm of high computer technology expands and the numerical methods develop, computational fluid dynamics (CFD) integrated with one of the particle track models has become a hot research area for assessing and predicting cyclone performance and gas–particle behavior with a simplified approach. ,, However, the gas and particle phases are influenced by each other, making resolving all of the details of a gas–particle system through computational simulation challenging and not fully understood . Given the highly turbulent flow within cyclone separators, the Reynolds stress model (RSM) and large eddy simulation (LES) have garnered significant attention for modeling turbulent forces. , The LES is a computationally expensive method for examining the time-averaged flow field in contrast with the RSM, which requires a very fine mesh and small-time steps, making the simulation very expensive in time. , Despite the popularity of the standard k –ε model in modeling full turbulence flow, it provides inadequate predictions and inaccurate rate results of flow field in cyclones due to the isotropic disturbance assumption of gas turbulence, resulting in excessive turbulence viscosities and unrealistic tangential velocities. − In light of this, the RSM is highly recommended for more accurate predictions of velocity fluctuation profiles and collection efficiency in cyclone separators. ,,, …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

El-Emam,

Zhou,

Bai

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

This research presents a comprehensive study aimed at investigating the influence of different cyclone geometries on the flow field and performance in gas−bioparticle flows. Five distinct cyclone designs, including Stairmand high-efficiency (St 1 ), Stairmand high-flow (St 2 ), Swift high-efficiency (Sw 1 ), Swift highflow (Sw 2 ), and typical Lapple (TL), were involved. The investigation utilized a combination of computational fluid dynamics (CFD) and the discrete element method (DEM) to model the gas−particle behavior. The DEM accounted for the motion of individual particles using Newton's equations, while the CFD solved the Navier−Stokes equations to model the gas flow as a continuous medium. This numerical model successfully simulated the cyclone performance under three-dimensional (3D) true shape modeling of large-sized nonspherical bioparticles considering the particle−particle and particle−wall interaction forces. The experimental validation and verification of the model demonstrated an acceptable agreement with the simulated data. The findings revealed that cyclone dimensions significantly impacted both performance and particle behavior even when operating under identical conditions. Cyclones with matching dimensions between the bottom and vortex finder exhibited improved separation efficiency, while an increase in the vortex finder's diameter led to decreased efficiency, as in St 2 and Sw 2 cyclones. A comprehensive force analysis pinpointed regions of intense particle−wall collisions, predominantly at the cone wall apex and the wall opposite the cyclone inlet, particularly evident in St 1 , Sw 1 , and TL cyclones. Notably, particle−particle interaction forces played a crucial role in cyclone performance with increased separation efficiency observed due to particle collisions. The particle−gas forces, including drag and pressure gradient forces, were mainly affected in the inlet region and extended into the cylindrical part. The pressure gradient force exhibited a minimal impact on particle behavior. Among the cyclone designs tested, the Sw 1 cyclone demonstrated outstanding performance, achieving an impressive effectiveness of 94.4% under the given operational conditions. These findings provide a better understanding of the working mechanisms of gas−particle cyclones and similar swirling multiphase flow systems, allowing for improved optimization.

show abstract

Section: Numerical Simulation Analysissupporting

confidence: 90%

Section: Lapple Cyclonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

El-Emam,

Zhou,

Bai

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…[ 15 ] Wang et al reported that the symmetrical double inlet does not always improve the efficiency, and the appropriate inlet volute wrap angle should be selected according to the actual situation. [ 16 ] Yan et al inserted an expanding section between the cylinder and the particle exit tube which made the separator have a separation efficiency of over 80% for fine particles (average diameter is below 10 μm). [ 17 ] Duan et al installed a cylinder vortex stabilizer which increased the separation efficiency by 5.52% for particles whose diameters were smaller than 3 μm while increasing the pressure drop by 3.61%.…”

Section: Introductionmentioning

confidence: 99%

Multi‐object optimization study on the performance of gas cyclones based on heterogeneous condensation and turbulent agglomeration

et al. 2023

View full text Add to dashboard Cite

Improving the separation efficiency of fine particles becomes more and more critical as environmental pollution aggravates. This study aims to investigate the effects of four key parameters on the performance of gas cyclones, including cyclone body height, particle concentration, initial supersaturation degree, and inlet temperature. Then, the two‐way coupling numerical model, in which is the process of heterogeneous condensation and agglomeration for insoluble fine particles, was achieved by user defined function. On this basis, the response surface analysis method and multi‐objective genetic algorithm were adopted to optimize the cyclone. The results show that when the particle concentration is less than 1000 mg/m3, the separation efficiency can reach above 95%. The initial supersaturation degree has the greatest effect on the separation efficiency and vapour consumption rate, while the cyclone body height is the most critical factor on the pressure drop. As the particle concentration increases, the separation efficiency decreases at first and then keeps almost stable. With the increase of inlet temperature, the separation efficiency is enhanced, and the pressure drop reduces. These research results can provide important guidance for the optimization and engineering application of this technology.

show abstract

“…This is the height of the cylindrical part, the conical part, the inlet and outlet nozzles, the dimensions of the bunker, etc. In many works, the influence of the main geometric parameters on the value of the hydraulic resistance and the efficiency of the cyclone was studied [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

The influence of the design of the upper cover of the cyclone on its characteristics

Майструк

2023

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

An analysis of the works in which the designs of widespread dust-capturing devices are studied. It has been established that the prediction of the operation of dust-collecting devices in certain conditions is most effectively carried out by the methods of numerical modeling and simulation of the separation process, which are widely used for the research of devices of this type. With the help of numerical modeling methods, the structure of the gas flow in the cyclone for different designs of the top cover, the influence of the gas flow velocity in the inlet nozzle on the hydraulic resistance of the device and compared it with experimental data were determined.

show abstract

Effect of inlet volute wrap angle on the flow field and performance of double inlet gas cyclones

Cited by 20 publications

References 25 publications

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

Multi‐object optimization study on the performance of gas cyclones based on heterogeneous condensation and turbulent agglomeration

The influence of the design of the upper cover of the cyclone on its characteristics

Contact Info

Product

Resources

About