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Open AccessFeature PaperArticle

Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts

Department of Engineering, Università degli Studi della Campania “Luigi Vanvitelli”, Via Roma 29, 81031 Aversa, Italy
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Water 2021, 13(2), 165; https://doi.org/10.3390/w13020165
Received: 28 November 2020 / Revised: 31 December 2020 / Accepted: 12 January 2021 / Published: 12 January 2021
(This article belongs to the Section Hydraulics and Hydrodynamics)
Vortex drop shafts are special manholes designed to link sewer channels at different elevations. Significant energy head dissipation occurs across these structures, mainly due to vertical shaft wall friction and turbulence in the dissipation chamber at the toe of the shaft. In the present study two aspects, sometimes neglected in the standard hydraulic design, are considered, namely the energy head dissipation efficiency and the maximum pressure force in the dissipation chamber. Different physical model results derived from the pertinent literature are analyzed. It is demonstrated that the energy head dissipation efficiency is mostly related to the flow impact and turbulence occurring in the chamber. Similarly to the drop manholes, a relation derived from a simple theoretical model is proposed for the estimation of the energy head loss coefficient. The analysis of the pressures measured on the chamber bottom allows to provide a useful equation to estimate the pressure peak in the chamber as a function of the approach flow energy head. View Full-Text
Keywords: dissipation chamber; drop manhole; energy dissipation; hydraulic structure; pressure force; urban drainage system; vortex drop shaft dissipation chamber; drop manhole; energy dissipation; hydraulic structure; pressure force; urban drainage system; vortex drop shaft
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MDPI and ACS Style

Crispino, G.; Contestabile, P.; Vicinanza, D.; Gisonni, C. Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts. Water 2021, 13, 165. https://doi.org/10.3390/w13020165

AMA Style

Crispino G, Contestabile P, Vicinanza D, Gisonni C. Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts. Water. 2021; 13(2):165. https://doi.org/10.3390/w13020165

Chicago/Turabian Style

Crispino, Gaetano; Contestabile, Pasquale; Vicinanza, Diego; Gisonni, Corrado. 2021. "Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts" Water 13, no. 2: 165. https://doi.org/10.3390/w13020165

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