Anti-vortex devices: Laser measurements of the flow and functioning

Trivellato, F.

doi:10.1016/j.optlaseng.2009.11.010

Cited by 22 publications

(12 citation statements)

References 6 publications

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“…Another air prevention strategy is to avoid intake vortices. The available alternatives are illustrated in Gulliver et al (1986) and include guiding the far field flow and reducing the intake velocity or installing antivortex devices, such as funnels (Trivellato 2010) or horizontal (perforated or solid) plates at the top of intakes (Amiri et al 2011). CFD progressively is playing a role of estimating such terms, although it remains expensive and often difficult.…”

Section: Preventing Air Admissionmentioning

confidence: 99%

Encouraging Effective Air Management in Water Pipelines: A Critical Review

Ramezani

Karney

Malekpour

2016

J. Water Resour. Plann. Manage.

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Air can be entrapped in water and wastewater systems under a variety of conditions, and if such air is not managed properly, it can impose considerable operational penalties. To avoid these problems and the dangers associated with air pockets, several air management strategies have been routinely suggested. However, the devastating consequences of air pockets frequently documented in the literature imply the need for further development in this area. Improving air management obviously requires a thorough understanding of the current strategies and their shortcomings. This paper overviews the sources of air in pipes and key consequences associated with its presence. Current measures for managing air in water pipes are reviewed and critiqued. Finally, knowledge gaps that limit the efficient application of current air management strategies to real world problems are identified, and suggestions for future development are presented.

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Section: Preventing Air Admissionmentioning

confidence: 99%

Encouraging Effective Air Management in Water Pipelines: A Critical Review

Ramezani

Karney

Malekpour

2016

J. Water Resour. Plann. Manage.

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“…Not only FSV has been studied but also anti-vortex devices are used to eliminate its bad effect as in [15] who presented a new funnel-shaped device whose performance is proved experimentally to be successful. In the Mold Casting field, ''Ref".…”

Section: Fsv As a Harmful Sourcementioning

confidence: 99%

A Review on Micro Hydro Gravitational Vortex Power and Turbine Systems

et al. 2014

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Electrical power is essential in commercial and social investments like lighting, heating, communications, computers, industrial equipment, transport etc. Therefore hydropower energy is one of the most suitable and efficient source of renewable energy which depends on more than century of experience for this issue. The power capacity and facility are two criteria required for the classification of hydropower plant. The first one consists of five technologies: dammed reservoir, run of river, pumped storage, in stream technology and new technology gravitational vortex. The other one is classified according to power scale is Large, Small, Micro and Pico Hydropower. This paper is focusing on micro hydropower especially gravitational vortex power which increases the sustainability and health of the water as a whole. It presents an overview from both flow and power points of view by discussing the free surface vortex (FSV) and the suitable turbine systems which are used in micro hydropower.

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“…Sarkardeh et al (2014) obtained the velocity field in a reservoir in the presence of an air-core vortex. Borghei and KabiriSamani (2010), Mahyari et al (2010), Trivellato (2010) and Naderi et al (2014) discussed the efficiencies of various antivortex devices, and Odgaard (1986) and Suerich-Gulick et al…”

Section: Introductionmentioning

confidence: 99%

Scale and flow boundary effects for air-entraining vortices

Taştan

2017

Proceedings of the Institution of Civil Engineers - Water Manag

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A challenge when designing water intake structures in rivers, channels and reservoirs is to reduce the entrainment of air through free air-core vortices. Entrained air can cause discharge reduction, vibration and cavitation in the waterconveying system. This study firstly investigates flow boundary effects at the critical submergence of an intake, which is the depth up to which air entrainment occurs. The friction effect of a boundary section close to the free surface dominates the boundary blockage effect and retards the occurrence of the air-entraining vortex. Potential flow solution methods overpredict the critical submergence of an intake under the influence of boundary friction, so a design criterion is presented to correct this. Furthermore, previous work shows that Froude similarity is not always reliable for predicting critical submergence at prototype intakes. In the second part of this study, kinematic similarity -the equality of the ratios of intake velocity to the velocity at the imaginary critical spherical sink surface between the model and prototype intakes -is proposed and validated against experimental results. In addition, a theoretical explanation of the equal intake velocity concept is given using kinematic similarity.

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Anti-vortex devices: Laser measurements of the flow and functioning

Cited by 22 publications

References 6 publications

Encouraging Effective Air Management in Water Pipelines: A Critical Review

Encouraging Effective Air Management in Water Pipelines: A Critical Review

A Review on Micro Hydro Gravitational Vortex Power and Turbine Systems

Scale and flow boundary effects for air-entraining vortices

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