Enquête sur la formation de vortex et autres anomalies d'écoulement dans une enceinte avec ou sans surface libre

Berge, J.P. ten

doi:10.1051/lhb/1966001

Cited by 7 publications

(2 citation statements)

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“…Experimental and theoretical studies in the literature have led to proposing several empirical equations to predict Sc of intakes primarily in an open channel. Such empirical formulas are on the basis of prototype and physical model studies, and relate the relative Sc (Sc=D i , in which D i is the tunnel or intake diameter) either to flow velocity in the tunnel (Denny et al 1957) or to Froude number of the tunnel (Amphlett 1976;Berge 1966;Gordon 1970;Reddy and Pickford 1972). Other empirical relationships and charts available in the literature (Kocaabas and Yidirim 2002;Odgaard 1986;Reddy and Pickford 1972) mostly estimate Sc as a function of Froude number, Reynolds number, Weber number, circulation, and the vertical height of intakes.…”

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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“…Vortices were then studied in different hydraulic and geometric conditions and related hydraulic factors were measured. By collecting data, empirical equations have been developed and proposed for practical hydraulic designs such as for critical submerged depth (Denny & Young 1957;Berge 1966;Gordon 1970;Reddy & Pickford 1972;Amphlett 1976;Chang 1977;Anwar et al 1978;Jain et al 1978;Sarkardeh et al 2010;Amiri et al 2011). In numerical studies, by discretizing governing equations, flow motion equations have been solved for the flow domain.…”

Section: Introductionmentioning

confidence: 99%

An analytical model for vortex at vertical intakes

Sarkardeh

Marosi²

2021

Water Supply

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In the present paper, free surface vortex formation at intakes is investigated analytically. By assuming a spiral form for vortex streamlines, continuity and momentum equations were integrated and solved in a vortex flow domain. From this solution, velocity and pressure distributions were found above the intake under vortex action. An equation for the water surface profile was also found and compared with another research. By considering that in an air core vortex, pressure at the intake entrance drops to zero, a relationship was found for critical submerged depth and verified by experimental data and another analytical equation. It was concluded that the results of the proposed spiral analytical model had good agreement with the experimental data.

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