Experimental study on the effect of connecting ducts on demisting cyclone efficiency

Ehteram, Mohammad Ali; Tabrizi, Hassan Basirat; Mesbah, Mohsen; Ahmadi, Goodarz; Mirsalim, Mojtaba

doi:10.1016/j.expthermflusci.2012.01.002

Cited by 19 publications

(2 citation statements)

References 8 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].…”

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

View full text Add to dashboard Cite

show abstract

“…The results showed that particles were increasingly separated when the side flow velocity increased. Ehteram et al (2012) investigated the effect of cyclone inlet configuration on oil droplets impaction efficiency in different geometry like circle, triangle, rectangle with 14mm hydraulic diameter. The results showed that rectangle and triangle geometries have a better efficiency toward circle ones in the same hydraulic diameter.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of the Efficiency and Pressure Drop of an Inertial Impactor with Variable Area

Ayouri

Ehteram

2019

JAFM

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The deposition efficiency and pressure drop of inertial impactor with variable area has been studied numerically and experimentally. The effect of volumetric flow rate, vertical barrier, oblique barrier and flexible concave plate versus deposition and impaction efficiency and pressure drop is investigated. Numerical simulation is carried out with DPM (discrete phase method) and turbulent model of SST k-ω. To validate the numerical results a special test rig is designed to study the deposition efficiency of engine oil droplets (blow-by) with a diameter of 0.1 to 6 µm. Experimental Tests are done in 8, 12, 16 and 20 L/min. To ensure the accuracy of the experimental results, all the tests are repeated at least three times for each volumetric flow rate. Gravimetric method is implemented to calculate the deposition efficiency. According to the results, the deposition efficiency is obtained between 73 and 94 percent for different mentioned impactors and different volumetric flow rate. The numerical results are confirmed by experimental results. Using the barriers increase the efficiency maximum 6 percent in different volumetric flow rate. The results show that by reducing the distance between the vertical barrier and the outlet of nozzle, the deposition and impaction efficiency are increased. Also, the Concave flexible plate with vertical barrier located at 1 mm from the outlet of nozzle is the most efficient case.

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Numerical and experimental study of oscillatory behavior of liquid surface agitated by high-speed gas jet

Adib

Ehteram

Tabrizi

2018

Applied Mathematical Modelling

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Experimental study on the effect of connecting ducts on demisting cyclone efficiency

Cited by 19 publications

References 8 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

Experimental and Numerical Investigation of the Efficiency and Pressure Drop of an Inertial Impactor with Variable Area

Numerical and experimental study of oscillatory behavior of liquid surface agitated by high-speed gas jet

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