Numerical simulation and experimental performance research of cylindrical vane pump

A biomimetic wing is designed by considering the wing of a natural flyer (Passer Domesticus) as a reference. Since the birds have thin wings, Bergey BW-3, a thin and highly cambered airfoil, is used to design wing’s cross-section. To investigate the aerodynamic characteristics of biomimetic wing, numerical and experimental studies are carried out at low Reynolds number (Re) ranging from 2.5x10^4 to 1x10^5. The performance of biomimetic wing is compared with rectangular and elliptical wings at Re = 5x10^4. It is observed that the separation bubble formed over the surface of biomimetic wing at Re = 2.5x10^4 is not strong enough to influence the lift coefficient but dramatically increases the drag coefficient when the mean angle of attack exceeds 18^0. It is observed that the drop in lift coefficient of rectangular wing is higher than that of other wings due to presence of sharp edges in the planform. The lowest drag coefficient is witnessed in elliptical wing but it also has lowest lift coefficient due to the interaction between the separation bubble and tip vortices. But the biomimetic wing offers highest lift coefficient with a considerable amount of drag. It is observed that the flow separates dramatically as the mean angle of attack increases beyond the stall angle in rectangular and elliptical wings. But a delay in the flow separation is observed in case of biomimetic wing after the stall angle. It is also observed that the suction over the wing surface of biomimetic wing is more at wingroot than that at wingtip, which may provide good stability during flight conditions. The enhanced aerodynamic performance of the biomimetic wing is due to change in shape of the wing along the span which has a strong influence over its effective angle of attack with respect to the incoming flow.

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“…The efficiency and the accuracy of the solver are thoroughly verified and well documented in the literature. 24,25…”

Section: Methodsmentioning

confidence: 99%

“…The efficiency and the accuracy of the solver are thoroughly verified and well documented in the literature. 24,25 Computational domain. A semi-spherical fluid domain is modelled for the present numerical study.…”

Section: Numerical Proceduresmentioning

confidence: 99%

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Shaik

Hazarika

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Previous studies have examined the influence of different flow parameters on pump performance, including inlet gas void fraction (IGVF), rotational speed, etc. Cheng et al [2] introduced a novel cylindrical vane pump, whose efficiency was corroborated through experimental and numerical methods. The Computational Fluid Dynamics (CFD) model of the pump exhibited a maximum error rate of 5.7%, validating its successful design as a positive-displacement pump.…”

Section: Introductionmentioning

confidence: 95%

The Influence of Blade Tip Clearance on the Flow Field Characteristics of the Gas–Liquid Multiphase Pump

Deng,

Li,

et al. 2023

Processes

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Gas–liquid multiphase pumps are critical transportation devices in the petroleum and chemical engineering industries, and improving their conveyance efficiency is crucial. This study investigates the influence of blade tip clearance variations on the flow characteristics within a multiphase pump. Numerical simulations were conducted using Eulerian two-phase and SST k-ω turbulence models with four distinct tip clearance sizes (0 mm, 0.3 mm, 0.6 mm, and 0.9 mm). The performance curve, tip leakage flow (TLF), and internal gas distribution were subjected to analysis. The results indicate that the TLF is linearly related to the clearance size and traverses multiple flow passages, resulting in energy losses and a reduced pump head coefficient. Larger tip clearances (0.6 mm and 0.9 mm) exhibited a more uniform flow pattern, contrasting the irregularities seen with a 0.3 mm clearance. Compared to no tip clearance (0 mm), gas holdup within the impeller passages decreased by 18.39%, 39.62%, and 58.53% for clearances of 0.3 mm, 0.6 mm, and 0.9 mm, respectively, leading to decreased overall system efficiency. This study highlights the connection between tip clearance size and flow dynamics in multiphase pumps, offering insights for optimal tip clearance selection during multiphase pump design.

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Numerical simulation and experimental performance research of cylindrical vane pump

Cited by 2 publications

References 35 publications

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

The Influence of Blade Tip Clearance on the Flow Field Characteristics of the Gas–Liquid Multiphase Pump

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