Design of a Scroll Vortex Inlet for Supercritical Approach Flow
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 10
Abstract
Vortex drop shafts are used in urban drainage systems to connect two sewers located at considerably different elevations. After their introduction in 1947, these were studied with particular reference to subcritical approach flow. Vortex shafts for supercritical approach flow can also be used, but the intake structure may have relatively high cost due to the complex geometry. The present study includes experimental results of a specific investigation on the changes to be made in the supercritical approach channel if a subcritical vortex intake is used. The experimental investigation analyzes the effect of a hydraulic jump on the performance of vortex intake structure to define appropriate technical solutions, essentially consisting in a negative step to be located along the supercritical approach channel. Design criteria are finally presented for the evaluation of the step height and its distance from the vortex intake structure.
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Acknowledgments
The assistance of Mr. Alessio Cioce and Mrs. Paola Spatuzzi during the experimental investigation is gratefully acknowledged. Finally, the writers would like to thank the anonymous reviewers for their constructive comments.
References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 10 • October 2010
Pages: 837 - 841
Copyright
© 2010 ASCE.
History
Received: Jun 12, 2009
Accepted: Apr 1, 2010
Published online: Apr 9, 2010
Published in print: Oct 2010
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