Book ChapterDOI
8.05 – Air Turbines
A.F.O. Falcão,L.M.C. Gato +1 more
- Vol. 8, pp 111-149
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TLDR
In this paper, the authors presented the aerodynamic theory of axial-flow turbines and applied it to the Wells turbine and the impulse turbine, including their variants, in order to analyze their integration into the OWC wave energy converter.Abstract:
Air turbines are used to equip oscillating water column wave energy converters. In almost every case, self-rectifying turbines have been adopted which do not require non-return valves to rectify the reciprocating air flow induced by the water column oscillations. The most frequently used or proposed self-rectifying air turbines are the Wells turbine and the impulse turbine, both of axial-flow type. The fundamentals of the aerodynamic theory of axial-flow turbines are presented and then applied to the Wells turbine and the impulse turbine, including their variants. Information is given on methods of, and results from, air turbine model testing, as well as on self-rectifying air turbines that equipped or equip prototypes tested in the sea. The final part of the chapter is devoted to the analysis of turbine integration into OWC wave energy converter.read more
Citations
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Journal ArticleDOI
Rotational Speed Control Using ANN-Based MPPT for OWC Based on Surface Elevation Measurements
TL;DR: In this paper, an ANN-based rotational speed control was proposed to avoid the stalling behavior in Oscillating Water Columns composed of a Doubly Fed Induction Generator driven by a Wells turbine.
Journal ArticleDOI
Design optimisation of a unidirectional centrifugal radial-air-turbine for application in OWC wave energy converters
TL;DR: In this article, a computational fluid dynamics (CFD)-based design optimisation of an outflow radial turbine for the intended application in an oscillating water columns (OWC) system configured to enable primarily unidirectional flow through the turbine is described.
Journal ArticleDOI
Sea trial results of the biradial and Wells turbines at Mutriku wave power plant
TL;DR: In this paper , the authors presented and analyzed detailed operational data of the OPERA's 30 kW turbo-generation set at the oscillating water column device of the Mutriku harbour breakwater and revealed operational data collected during the testing period.
Journal ArticleDOI
Model testing of a floating wave energy converter with an internal U-shaped oscillating water column
S. Ribeiro e Silva,Romero Gomes,B.S. Lopes,A.A.D. Carrelhas,Luís M.C. Gato,João C.C. Henriques,J.M. Gordo,António F.O. Falcão +7 more
TL;DR: In this article, an experimental study on the hydrodynamic responses of the UGEN, a wave energy converter consisting of an asymmetric floater with an internal U-shaped tank partially filled with water, is presented.
Journal ArticleDOI
Control law design for the air-turbine-generator set of a fully submerged 1.5 MW mWave prototype. Part 1: Numerical modelling
TL;DR: The design and testing of an effective control law to be implemented into the programmable logic controller of the membrane-pump turbine-generator set, allowing efficient and safe operation for the wave climate at the Pembrokeshire test site.
References
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Theory of Wing Sections
TL;DR: Chang et al. as discussed by the authors proposed a new geometric analysis procedure for wing sections based on the normal mode analysis for continuous functions, which can be used to calculate the section length.
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Fluid mechanics, thermodynamics of turbomachinery
TL;DR: The Fluid Mechanics and Thermodynamics of Turbomachines (FLMTH) as discussed by the authors is a classic text in the field of turbomachines, which has been used as a core text in both undergraduate and graduate level courses.
Book
Fluid dynamics and heat transfer of turbomachinery
TL;DR: In this paper, the dynamique des : fluides, transfert de chaleur, turbomachines, aerodynamique, thermodynamique Reference Record created on 2005-11-18, modified on 2016-08-08