Investigation of energy performance, internal flow and noise characteristics of miniature drainage pump under water–air multiphase flow: design and part load conditions

Ali, Asad; Si, Qiaorui; Yuan, Jianping; Shen, Chunhao; Cao, Rui; AlGarni, Tahani Saad; Awais, Muhammad; Aslam, Bilal

doi:10.1007/s13762-021-03619-1

Cited by 11 publications

(7 citation statements)

References 33 publications

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“…A confirmation of the boundary layer at the wall and the selected turbulence model is considered as y+. The detailed description and expression are presented in studies [36][37][38]. The value of y+ in the first cell next to the solid boundary was 0.36, which was acceptable for the applied turbulence model.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 93%

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

et al. 2022

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The variation in the two-phase flow parameters in a cylindrical body of new geometry and principle of operation are considered for a device for separating solids from air flow, solving the problem of numerical flow modeling. The aim of this research was to analyze the changes in the parameters of a multi-channel cylindrical cyclone in a mathematical model and to compare it with the results of the examined physical model. Studies on the numerical modeling of cyclones are reviewed, and models and equations for complex vortex flow description are applied. Differential equations were numerically solved by the finite volume method using the standard turbulence models of k‒ε and RNG k‒ε. Numerical modeling of the velocities, pressures, and volumes of both phases of the two-phase flow was performed. The simulation of the volume distribution of the second phase (glass particles) in the cyclone structure at flow rates of 10.9 m/s, 13.9 m/s, and 21.9 m/s was performed. The values obtained were compared with the physical model of the cyclone in question. The mean relative error was ± 6.9%.

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Section: Initial and Boundary Conditionsmentioning

confidence: 93%

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

et al. 2022

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“…To consider the calculation cycle and its reliability of numerical calculation, grid-independent analysis was carried out, as shown in Figure 3 . Since the previous literature [ 24 , 25 ] showed that if the absolute error of the predicted value of the two heads before and after is within 2%, then the influence of the mesh elements can be ignored. From Figure 3 , when the grid number is less than 1.72 million, the grid number has a large influence on the head.…”

Section: Three-dimensional Model and Grid Divisionmentioning

confidence: 99%

Numerical Study on the Cavitation Characteristics of Micro Automotive Electronic Pumps under Thermodynamic Effect

Ali

Feng³

et al. 2022

Micromachines

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In order to study the influence of thermodynamic effects on the cavitation performance of hydromechanics, the Singhal cavitation model was modified considering the influence of the thermo-dynamic effects, and the modified cavitation model was written into CFX using the CEL language. Numerical simulation of the cavitation full flow field at different temperatures (25 °C, 50 °C and 70 °C) was carried out with the automotive electronic water pump as the research object. The results show that the variation trend of the external characteristic simulation and experimental values is the same at all flow rates, and the calculation accuracy meets the subsequent cavitation demand. With the increase in temperature, the low-pressure area inside the automotive electronic pump’s impeller decreases. NPSHr decreases and the cavitation resistance is enhanced. During the process of no cavitation to cavitation, the maximum pressure pulsation amplitude in the impeller channel gradually increases. The generation and collapse of cavitations cause the change of pressure pulsation in the internal flow field, causing pump vibration.

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“…The following mesh parameters [33] have been used during the simula putational mesh includes a boundary layer created in the area of the obliqu following settings: number of layers-6, growth rate-1.2, maximum thickn In addition, in the oblique-cut region and the area of the vapor-liquid flo…”

Section: Computational Modelmentioning

confidence: 99%

“…The following mesh parameters [33] have been used during the simulation. The computational mesh includes a boundary layer created in the area of the oblique cut with the following settings: number of layers-6, growth rate-1.2, maximum thickness-0.15 mm.…”

Section: Computational Modelmentioning

confidence: 99%

Flow Modeling in a Vortex Chamber of a Liquid–Steam Jet Apparatus

et al. 2022

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The article investigated the flow of boiling streams through a nozzle with an oblique cut. Due to this flow organization, deviation from the nozzle axis at the vortex chamber inlet occurred. The study of flow modeling in the inlet section was carried out. The flow design and the calculation scheme of the vortex liquid–steam jet apparatus were proposed. Analytical expressions between the main operating parameters were obtained according to the developed mathematical model. A recommended oblique-cut angle for the active-flow nozzle was evaluated considering the transition through the first critical section based on the tangential velocity flow model. Validation of the mathematical model in the inlet section of the vortex chamber was provided based on the comparison with available experimental data. Flow visualization in the inlet section of the vortex chamber was obtained. The assumption of uneven flow distribution was confirmed experimentally. Overall, the boiling liquid flow was implemented in the active flow nozzle. The obtained scientific and practical results help to determine geometric parameters and physical characteristics of the vortex-type liquid–steam jet apparatus at the design stage. The obtained results were implemented to modernize vacuum units based on vortex type liquid–steam jet apparatuses.

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Investigation of energy performance, internal flow and noise characteristics of miniature drainage pump under water–air multiphase flow: design and part load conditions

Cited by 11 publications

References 33 publications

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

Numerical Study on the Cavitation Characteristics of Micro Automotive Electronic Pumps under Thermodynamic Effect

Flow Modeling in a Vortex Chamber of a Liquid–Steam Jet Apparatus

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