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OPTIMAL ORTHOGONAL TURBINES OF LOW POWER IN THE INFINITE FLOW
https://doi.org/10.15518/isjaee.2018.07-09.063-085
Abstract
The paper deals with the variants of the design of free flow high-speed orthogonal aggregates (VAWT-USA terminology) that convert the energy of currents in conditions when the turbine dimensions are much smaller than the depth and width of the flow. It is established that the considered turbines of large length can have the greatest efficiency in variants with one balanced blade when the blade chord is approximately equal to the turbine radius and is deployed by 3-5 degrees (the blade sock outwards from the track). The optimal rotation speed in this case is about 4 times higher than the flow velocity, and when a constant speed of rotation, the maximum power on the turbine shaft is achieved at a flow velocity close to the blade speed. A balanced turbine with two blades and the same solidity (the chord of the blade is half of the radius) has approximately the same efficiency but with the speed of the blades is about 2.5 times higher than the flow velocity on the upstream of the turbine. Moreover, the paper notes the possibility of a noticeable increase in the efficiency of turbines by optimizing the rotation of the blades on the track and increasing the relative diameter of the turbine (D/L >5).
About the Author
V. M. Lyatkher
British American Turbines, Inc;
New Energetics Inc.;
Novaya Energetika” Ltd.
Russian Federation
D.Sc. in Engineering; Professor of Moscow University of Environmental Protection; Member of Academy of Water Researches, Russia; Project Engineer and Researcher, British American Turbines, Inc.; President of Clean Energy Co. (USA); New Energetics Inc. (USA); CEO of “Novaya energetika” Ltd. (Russia)
Russian Federation
D.Sc. in Engineering; Professor of Moscow University of Environmental Protection; Member of Academy of Water Researches, Russia; Project Engineer and Researcher, British American Turbines, Inc.; President of Clean Energy Co. (USA); New Energetics Inc. (USA); CEO of “Novaya energetika” Ltd. (Russia)
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Review
For citations:
Lyatkher V.M. OPTIMAL ORTHOGONAL TURBINES OF LOW POWER IN THE INFINITE FLOW. Alternative Energy and Ecology (ISJAEE). 2018;(7-9):63-85. https://doi.org/10.15518/isjaee.2018.07-09.063-085
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