Numerical investigation on dynamic characteristics of flow field in cyclone separators with different dust hopper structures

Zhu, Liyun; Wang, Sen; Yi, Ruokun; Wang, Jianzhu; Li, Anjun; Ma, Zhenfei; Wang, Zhenbo

doi:10.1016/j.partic.2023.01.016

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…Many published research works have shown how the structure form and parameters of the cyclone affect the internal flow field distribution, as well as the performance (including separation efficiency and pressure drop) [14][15][16][17][18]. For a single parameter or multiple parameters, many relevant studies have been conducted, such as those on cyclone length and diameter [19,20], vortex finder dimension [21][22][23], inlet and outlet size [24,25], and Processes 2024, 12, 474 2 of 14 cyclone hopper geometry [26,27]. Notwithstanding, most previous studies have focused on the flow field time-mean characteristics, few studies have paid close attention to the flow field dynamic characteristics, and the influence of structural factors on the dynamic characteristics has been mostly neglected in many of these studies.…”

Section: Introductionmentioning

confidence: 99%

Effects of Diameter Parameters on Gas Flow Field Characteristics in Cyclones: An Experimental Investigation

Sun,

Xie,

Dong

et al. 2024

Processes

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The flow field characteristic is crucial for the separation process of cyclones, which includes time–mean and dynamic characteristics. The structural parameters of the cyclone have an important influence on the internal flow field characteristics, among which the cylinder diameter and vortex finder diameter are important structural parameters. This experimental study aimed to assess the effects of diameter parameters on the flow field characteristics of cyclones, especially the dynamic characteristics, which have received less attention in the literature. A hot wire anemometer (HWA) was employed in measuring the instantaneous tangential velocities in cyclones with different cylinder and vortex finder diameters. Time and frequency domain analyses of the measured data revealed that the diameter parameters of cyclones affected not only the distributions of the time–mean and instantaneous tangent velocities but also the intensity and dominant frequency of the instantaneous tangential velocity fluctuations. First, the maximum tangential velocity in the cyclone increased slightly when the cylinder diameter was increased and decreased significantly when the vortex finder diameter was increased. Second, the tangential velocity fluctuation intensity characterized by the standard deviation (Sd) increased on the same dimensionless axial section when the cylinder diameter was increased and the vortex finder diameter was decreased. It was also found that the increases in cylinder diameter and vortex finder diameter led to the dominant frequencies in the cyclone being reduced. Based on the results of this study, the dominant frequency calculation model for cyclones was improved. The conclusions presented in this study may provide valuable insights into the dynamic characteristics of flow fields in cyclones for future improvements to separation performance.

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Section: Introductionmentioning

confidence: 99%

Effects of Diameter Parameters on Gas Flow Field Characteristics in Cyclones: An Experimental Investigation

Sun,

Xie,

Dong

et al. 2024

Processes

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“…Multi-phase separation is achieved by the centrifugal force [5,6]. In cyclone separators, the rotating turbulence field inside the cyclone is rather complex [7,8]. Simulations based on Reynolds stress and large eddy models were shown to accurately simulate the flow characteristics in the cyclone separators [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

CFD Investigation on the Performance of Cyclone Separators with Divergent or Convergent Insertion Pipes

et al. 2023

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For multi-phase separation, developing high-performance cyclone separators is highly demanded. In this study, different divergent or convergent insertion pipes bFelow the vortex finder are employed to improve the separation performance. The impacts of insertion pipe geometrical configurations on the flow characteristics, pressure drop, and separation efficiency are systematically analyzed. The results reveal that the employed insertion pipe can significantly affect the static pressure distribution inside the cyclone. A longer insertion pipe length and larger tilt angle result in a wider central low-pressure area and smaller overall static pressure. The divergent insertion pipes increase pressure loss, while the convergent insertion pipes augment pressure loss. A larger insertion pipe length significantly impacts the axial velocity distribution. For divergent insertion pipes, the maximum central axial velocity increases with increasing tilt angles and then decreases. For small particles (dp ≤ 5 μm), a convergent insertion pipe exhibits a better separation performance. When the particle diameter dp ≥ 5 μm, divergent insertion pipes with larger angles and lengths can significantly decrease the pressure drop while guaranteeing satisfied collection efficiency. When L = 75 mm and θ = 60°, the pressure drop is reduced by 7.8%. This study may contribute to rationally designing high performance cyclone separators and also paves ways for improving the existing cyclone separators.

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Experimental and CFD studies on collection efficiency of separator with arc settlers of fluidized bed catalytic reactor

Zinurov,

Dmitriev,

Kharkov

et al. 2024

Chemical Engineering and Processing - Process Intensification

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Numerical investigation on dynamic characteristics of flow field in cyclone separators with different dust hopper structures

Cited by 9 publications

References 44 publications

Effects of Diameter Parameters on Gas Flow Field Characteristics in Cyclones: An Experimental Investigation

Effects of Diameter Parameters on Gas Flow Field Characteristics in Cyclones: An Experimental Investigation

CFD Investigation on the Performance of Cyclone Separators with Divergent or Convergent Insertion Pipes

Experimental and CFD studies on collection efficiency of separator with arc settlers of fluidized bed catalytic reactor

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