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Leakage-Flow Models for Screw Extruders [PDF]
Polymers, 2021 Many theoretical analyses of extrusion ignore the effect of the flight clearance when predicting the pumping capability of a screw. This might be reasonable for conventional extruder screws with “normal” clearances but leads to errors when more advanced screw designs are considered. We present new leakage-flow models that allow the effect of the flight
Christian Marschik +4 more
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Numerical Analysis on Pipeline Leakage Characteristics for Incompressible Flow
Journal of Applied Fluid Mechanics, 2019 Systematic Computational Fluid Dynamics (CFD) simulations on incompressible water pipe flow with leakage were conducted in the present study. The aim is to provide the understanding of how different parameters, including the leakage pipe diameter, inlet ...
Z. Zeng, R. Luo
doaj +4 more sources
Effect of hydraulic and geometric factors upon leakage flow rate in pressurized pipes
RBRH, 2021 Computational Fluid Dynamics (CFD) simulations of a leakage in a pressurized pipe were undertaken to determine the empirical effects of hydraulic and geometric factors on the leakage flow rate.
Mayara Francisca da Silva +2 more
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Rakenteiden Mekaniikka, 2023 The effect of wall leakage on the traditional duct flow equations based of the balance of mass, momentum and mechanical energy applied on a duct section is considered. Application of the momentum balance produces a Bernoulli equation type form, where the multiplier 1/2 in the dynamic pressure is however replaced by the value 1. Some relevant literature
Salonen, Eero-Matti, Holopainen, Rauno
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The Influence of Radial and Axial Gaps on Volumetric Efficiency of External Gear Pumps
Energies, 2021 The design of gear pumps and motors is focused on more efficient units which are possible to achieve using advanced numerical simulation techniques. The flow that appears inside the gear pump is very complex, despite the simple design of the pump itself.
Paulina Szwemin, Wieslaw Fiebig
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Fractal and Fractional, 2023 Axial-flow turbomachinery is widely used in low head water transfer and electricity generation projects. As there is a gap between the impeller and casing of the tubular flow unit, the fluid will cross the gap to form tip leakage flow, which may induce ...
Zilong Hu +4 more
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Energies, 2022 Both the compressor performance and the 3D flows inside the stator passage are significantly impacted by the stator hub gap. The interplay between leakage flow and corner separation within a cantilevered stator of a highly loaded, low-speed axial ...
Guangfeng An +5 more
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Experimental Study of the Leakage Flow in an Axial-Flow Fan at Variable Loading
International Journal of Turbomachinery, Propulsion and Power, 2021 The present paper reports a 2D-PIV (particle image velocimetry) study of the effect of the operating point on the leakage flow in a low-speed ring fan.
Edward Canepa +3 more
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Retrograde Flow Cement Leakage during Kyphoplasty
Maedica - A Journal of Clinical Medicine, 2022 Objective: To report a rare event of a retrograde flow of cement leakage during balloon kyphoplasty and discuss the possible mechanism. Methods:We present a 55-year-old male patient, who underwent a 4-level balloon kyphoplasty for Langerhans histiocytosis that had spread to the spine.
Kalliopi, Alpantaki +3 more
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Measured Air Flow Leakage in Facemask Usage
International Journal of Environmental Research and Public Health, 2023 The importance of wearing a facemask during a pandemic has been widely discussed, and a number of studies have been undertaken to provide evidence of a reduced infectious virus dose because of wearing facemasks. Here, one aspect that has received little attention is the fraction of breathing flow that is not filtered because it passes as leak flow ...
Poul S. Larsen +2 more
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