Analysis of counter-rotating wind turbines

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Abstract

This paper presents a study on the performance of a wind turbine with two counter-rotating (CRWT) rotors. The characteristics of the two counter-rotating rotors are on a 3-bladed Nordtank 500 kW rotor. The analysis has been carried out by using an Actuator Line technique implemented in the Navier-Stokes code EllipSys3D. The analysis shows that the Annual Energy Production can be increased to about 43.5 %, as compared to a wind turbine with a single rotor. In order to determine the optimal settings of the CRWT turbine, parameters such as distance between two rotors and rotational speed have been studied. © 2007 IOP Publishing Ltd.

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Shen, W. Z., Zakkam, V. A. K., Sørensen, J. N., & Appa, K. (2007). Analysis of counter-rotating wind turbines. In Journal of Physics: Conference Series (Vol. 75). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/75/1/012003

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