Water 2013, 5(3), 1380-1392; doi:10.3390/w5031380

Experimental Analysis of a Vertical Drop Shaft

Department of Civil, Architectural and Environmental Engineering, Università di Napoli Federico II, Via Claudio 21, 80125 Naples, Italy
* Author to whom correspondence should be addressed.
Received: 11 July 2013; in revised form: 16 August 2013 / Accepted: 3 September 2013 / Published: 12 September 2013
PDF Full-text Download PDF Full-Text [412 KB, Updated Version, uploaded 13 September 2013 14:34 CEST]
The original version is still available [405 KB, uploaded 12 September 2013 16:29 CEST]
Abstract: An experimental campaign is undertaken in order to investigate the hydraulic features of a vertical drop shaft, also considering the influence of a venting system consisting of a coaxial vertical pipe, projecting within the drop shaft with different plunging rates. Three different flow regimes are observed: a “weir flow” for very low head values, where the flow profile is subject to the atmospheric pressure; a “full flow” for high head values, where water flows in a pressurized regime along the whole shaft; and a “transitional flow” for intermediate water head values. Weir flow and full flow can be experimentally investigated under steady-state conditions, whereas transitional flow is a pulsating condition, alternately switching from full flow to weir flow. Considering some significant geometric parameters, a head-discharge relation is sought both for the non-vented and for the vented configurations, by means of an energy balance equation, with specific assumptions about intake losses.
Keywords: drop shaft; friction losses; intake losses; pipe Froude number; full flow; weir flow; transitional flow; cavitation

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

MDPI and ACS Style

Padulano, R.; Del Giudice, G.; Carravetta, A. Experimental Analysis of a Vertical Drop Shaft. Water 2013, 5, 1380-1392.

AMA Style

Padulano R, Del Giudice G, Carravetta A. Experimental Analysis of a Vertical Drop Shaft. Water. 2013; 5(3):1380-1392.

Chicago/Turabian Style

Padulano, Roberta; Del Giudice, Giuseppe; Carravetta, Armando. 2013. "Experimental Analysis of a Vertical Drop Shaft." Water 5, no. 3: 1380-1392.

Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert