Experimental analysis of the unsteady flow inside a Wells turbine

One of the most promising technologies for sea-wave energy conversion is the one based on the Oscillating Water Column (OWC) principle. The system is composed of two units, an open chamber that converts the sea water motion into an alternating air-flow, and a turbine driven by the latter. The altern...

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Autores principales:	Licheri Fabio, Puddu Pierpaolo, Ghisu Tiziano, Cambuli Francesco
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/b4a140ca58784b13bb1a2a88bd5ec7e2
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spelling	oai:doaj.org-article:b4a140ca58784b13bb1a2a88bd5ec7e22021-11-08T15:18:51ZExperimental analysis of the unsteady flow inside a Wells turbine2267-124210.1051/e3sconf/202131211009https://doaj.org/article/b4a140ca58784b13bb1a2a88bd5ec7e22021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/88/e3sconf_ati2021_11009.pdfhttps://doaj.org/toc/2267-1242One of the most promising technologies for sea-wave energy conversion is the one based on the Oscillating Water Column (OWC) principle. The system is composed of two units, an open chamber that converts the sea water motion into an alternating air-flow, and a turbine driven by the latter. The alternating flow of air requires a turbine capable of maintaining the same direction of rotation. The Wells turbine represents the simplest and most reliable device for this purpose. It is a self-rectifying axial turbine characterized by a rotor with symmetric blades staggered at 90 degrees relative to the axis of rotation. The vast majority of experimental works on Wells turbines and OWC devices analyzed their performance from a global point of view, often under steady conditions, in order to evaluate the pressure drop through the rotor, the torque produced and thus the turbine efficiency. This paper presents an experimental analysis of the three-dimensional flow inside a Wells turbine which operates in a facility capable of reproducing the alternating air-flow typical of an OWC system. The investigation is based on local flow measurements using several probes in order to describe the non-stationary air-flow, both up- and down-stream of the rotor at different heights, along the span of the blade. The investigation, conducted on a high-solidity turbine, details the behavior of the flow field inside the machine, aiming to provide a detailed description that can guide the aerodynamic optimization of the entire system (chamber and turbine) for a better energy conversion.Licheri FabioPuddu PierpaoloGhisu TizianoCambuli FrancescoEDP SciencesarticleEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 312, p 11009 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Environmental sciences GE1-350
spellingShingle	Environmental sciences GE1-350 Licheri Fabio Puddu Pierpaolo Ghisu Tiziano Cambuli Francesco Experimental analysis of the unsteady flow inside a Wells turbine
description	One of the most promising technologies for sea-wave energy conversion is the one based on the Oscillating Water Column (OWC) principle. The system is composed of two units, an open chamber that converts the sea water motion into an alternating air-flow, and a turbine driven by the latter. The alternating flow of air requires a turbine capable of maintaining the same direction of rotation. The Wells turbine represents the simplest and most reliable device for this purpose. It is a self-rectifying axial turbine characterized by a rotor with symmetric blades staggered at 90 degrees relative to the axis of rotation. The vast majority of experimental works on Wells turbines and OWC devices analyzed their performance from a global point of view, often under steady conditions, in order to evaluate the pressure drop through the rotor, the torque produced and thus the turbine efficiency. This paper presents an experimental analysis of the three-dimensional flow inside a Wells turbine which operates in a facility capable of reproducing the alternating air-flow typical of an OWC system. The investigation is based on local flow measurements using several probes in order to describe the non-stationary air-flow, both up- and down-stream of the rotor at different heights, along the span of the blade. The investigation, conducted on a high-solidity turbine, details the behavior of the flow field inside the machine, aiming to provide a detailed description that can guide the aerodynamic optimization of the entire system (chamber and turbine) for a better energy conversion.
format	article
author	Licheri Fabio Puddu Pierpaolo Ghisu Tiziano Cambuli Francesco
author_facet	Licheri Fabio Puddu Pierpaolo Ghisu Tiziano Cambuli Francesco
author_sort	Licheri Fabio
title	Experimental analysis of the unsteady flow inside a Wells turbine
title_short	Experimental analysis of the unsteady flow inside a Wells turbine
title_full	Experimental analysis of the unsteady flow inside a Wells turbine
title_fullStr	Experimental analysis of the unsteady flow inside a Wells turbine
title_full_unstemmed	Experimental analysis of the unsteady flow inside a Wells turbine
title_sort	experimental analysis of the unsteady flow inside a wells turbine
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/b4a140ca58784b13bb1a2a88bd5ec7e2
work_keys_str_mv	AT licherifabio experimentalanalysisoftheunsteadyflowinsideawellsturbine AT puddupierpaolo experimentalanalysisoftheunsteadyflowinsideawellsturbine AT ghisutiziano experimentalanalysisoftheunsteadyflowinsideawellsturbine AT cambulifrancesco experimentalanalysisoftheunsteadyflowinsideawellsturbine
_version_	1718441982814060544

Experimental analysis of the unsteady flow inside a Wells turbine

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