Abstract
Tangential vortex intakes are compact hydraulic structures commonly used in water supply, drainage and sewerage systems to convey water from high to low elevations efficiently. For certain design of tangential vortex intakes, flow instability can occur in the approach channel and the vortex dropshaft, resulting in undesirable hydraulic jump and shock waves. Due to the complex three-dimensional (3D) flow in the tangential vortex intake, current theoretical models are not sufficiently complete to interpret the flow process reliably. This paper presents an experimental and 3D Computational Fluid Dynamics (CFD) modeling study of an unstable tangential vortex intake flow. The CFD predictions are in good agreement with detailed point velocity and air core size measurements. Despite of the hydraulic jump at the tapering channel, the swirling flow at the vortex drop shaft is similar to that of a stable vortex intake with Rankine vortex behaviour.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Chan, S.N., Qiao, Q.S., Lee, J.H.W.: On the three-dimensional flow of a stable tangential vortex intake. J. Hydro-Environ. Res. (2018). (under review)
Hirt, C.W., Nichols, B.D.: Volume of fluid (VOF) method for the dynamics of free boundaries. J. Comput. Phys. 39(1), 201–225 (1981)
Jain, S.C.: Tangential vortex-inlet. J. Hydraul. Eng. 110(12), 1693–1699 (1984)
OpenFOAM: OpenFOAM - The Open Source CFD Toolbox - User Guide. Version 4.0 (2016)
Plant, J., Crawford, D.: Pushing the limits of tangential vortex intakes: is higher capacity and flow measurement possible in a smaller footprint? In: Proceedings of WEFTEC 2016, New Orleans, Water Environment Federation (2016)
Qiao, Q.S., Lee, J.H.W., Lam, K.M.: Steady vortex flow in tangential intake. In: Proceedings of 2013 IAHR World Congress, Chengdu, China (2013)
Yu, D.Y., Lee, J.H.W.: Hydraulics of tangential vortex intake for urban drainage. J. Hydraul. Eng. 135(3), 164–174 (2009)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
Chan, S.N., Qiao, Q.S., Lee, J.H.W. (2019). Flow Features of an Unstable Tangential Vortex Intake. In: Mannina, G. (eds) New Trends in Urban Drainage Modelling. UDM 2018. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-99867-1_55
Download citation
DOI: https://doi.org/10.1007/978-3-319-99867-1_55
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-99866-4
Online ISBN: 978-3-319-99867-1
eBook Packages: EnergyEnergy (R0)