Book ChapterDOI
8.05 – Air Turbines
A.F.O. Falcão,L.M.C. Gato +1 more
- Vol. 8, pp 111-149
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
Performance improvement of the biradial self-rectifying impulse air-turbine for wave energy conversion by multi-row guide vanes: Design and experimental results
TL;DR: The biradial turbine is an advanced, more efficient, version of the impulse self-rectifying turbine, as compared with the conventional axial-flow type, aiming to increase the turbine efficiency by reducing the losses by aerodynamic outflow stalling at the exit guide-vane system while ensuring the required inflow deflection by the inlet guide vanes.
Journal ArticleDOI
Oscillating flow rig for air turbine testing
TL;DR: In this article, a real-time hardware-in-the-loop flow controller was implemented to test self-rectifying air turbines under both steady and variable unidirectional airflows, and subsequent demonstration tests performed on an axial flow impulse turbine.
Journal ArticleDOI
Performance improvement of the axial self-rectifying impulse air-turbine for wave energy conversion by multi-row guide vanes: Design and experimental results
TL;DR: A new design method for high-deflection guide-vane systems arranged into multiple, rather than single, rows is presented, which aims to increase the turbine efficiency by reducing the losses caused by aerodynamic outflow stalling at the exit guide-Vane system while ensuring the required inlet guide- vane system inflow deflection.
Journal ArticleDOI
Aerodynamic analysis of a biradial turbine with movable guide-vanes: Incidence and slip effects on efficiency
TL;DR: In this article, a numerical study on the aerodynamics of a biradial turbine for wave energy conversion is presented, where the rotor and diffuser losses are reduced especially at operating conditions away from the peak efficiency point, resulting in higher average turbine efficiency.
Journal ArticleDOI
Design optimization of a purely radial turbine for operation in the inhalation mode of an oscillating water column
TL;DR: In this paper, the design of a centripetal-radial-turbine for optimum efficiency in steady-state using CFD methods for application with the pressure/flow profile experienced by the vented Oscillating-Water-Column (OWC).
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.
Book
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