Titolo:  A COMPARISON BETWEEN EXPERIMENTAL AND NUMERICAL ANALYSIS OF A WELLS TURBINE
Autori: 
Data di pubblicazione:  2015
Autori:  Ghisu, Tiziano; Puddu, Pierpaolo; Cambuli, Francesco
Presenza coautori internazionali:  no
Lingua:  Inglese
Titolo del libro:  11th European Turbomachinery Conference
ISBN:  978-000000000-2
Editore:  European Conference on Turbomachinery (ETC)
Pagina iniziale:  1
Pagina finale:  11
Numero di pagine:  11
Codice identificativo Scopus:  2-s2.0-85043442233
Codice identificativo ISI:  WOS:000380606100104
Revisione (peer review):  Esperti anonimi
Nome del convegno:  ETC 2015
Periodo del convegno:  23-27 March
Luogo del convegno:  MADRID
Abstract:  Wave energy is one of the renewable energy sources with the highest potential. Several pilot plants have been built based on the principle of the Oscillating Water Column (OWC). Among the different solutions that have been suggested, the Wells turbine has gained particular attention due to its simplicity and reliability. The majority of available studies concentrate on the steady operation of the Wells turbine, while only few analyze its performance under an unsteady and bi-directional air flow, as determined by the presence of the OWC system. In this work, experimental and numerical performance of a high-solidity Wells turbine with NACA0015 profiles under the bi-directional flow generated by a hydraulic piston is compared. The numerical simulations have been conducted using commercial CFD software and focus on unsteady predictions, with particular attention to the behavior of the flow upstream and down-stream of the rotor, flow hysteresis between acceleration and deceleration phases and differences between intake and exhaust strokes due to the non-symmetrical configuration of the machine.
Tipologia: 4.1 Contributo in Atti di convegno

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