Topic
Wells turbine
About: Wells turbine is a research topic. Over the lifetime, 2094 publications have been published within this topic receiving 28695 citations.
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01 Jan 1997
TL;DR: In this article, a 21-percent-thick laminar flow airfoil, the S809, for horizontal-axis wind-turbine applications, has been designed and analyzed theoretically and verified experimentally in the lowturbulence wind tunnel of the Delft University of Technology Low Speed Laboratory, The Netherlands.
Abstract: A 21-percent-thick, laminar-flow airfoil, the S809, for horizontal-axis wind-turbine applications, has been designed and analyzed theoretically and verified experimentally in the low-turbulence wind tunnel of the Delft University of Technology Low Speed Laboratory, The Netherlands. The two primary objectives of restrained maximum lift, insensitive to roughness, and low profile drag have been achieved. The airfoil also exhibits a docile stall. Comparisons of the theoretical and experimental results show good agreement. Comparisons with other airfoils illustrate the restrained maximum lift coefficient as well as the lower profile-drag coefficients, thus confirming the achievement of the primary objectives.
389 citations
TL;DR: In this article, the velocity held in the wake of a two-bladed wind turbine model (diameter 180 mm) has been studied under different conditions using a twocomponent hot wire.
Abstract: The velocity held in the wake of a two-bladed wind turbine model (diameter 180 mm) has been studied under different conditions using a two-component hot wire. All three velocity components were m ...
351 citations
TL;DR: In this article, the performance of a single plane biplane Wells turbine with or without guide vanes is compared with a wave energy device based on the principle of the oscillating water-air column.
286 citations
TL;DR: In this paper, a diffuser shroud with a broad-ring brim at the exit periphery and a wind turbine inside it is used to augment the power of a single wind turbine by a factor of about 2-5 compared with a bare wind turbine.
Abstract: We have developed a new wind turbine system that consists of a diffuser shroud with a broad-ring brim at the exit periphery and a wind turbine inside it. The shrouded wind turbine with a brimmed diffuser has demonstrated power augmentation by a factor of about 2–5 compared with a bare wind turbine, for a given turbine diameter and wind speed. This is because a low-pressure region, due to a strong vortex formation behind the broad brim, draws more mass flow to the wind turbine inside the diffuser shroud.
265 citations
TL;DR: In this paper, a theoretical model is developed to simulate the energy conversion from wave to turbine shaft of an oscillating-water-column (OWC) plant equipped with a Wells air-turbine and with a valve (in series or in parallel with the turbine) for air-flow control.
258 citations