A semi-analytical model for velocity profile at wind turbine wake using blade element momentum

Document Type : Research Paper

Authors

1 Mechanical Engineering Faculty, K. N. Toosi University of Technology, Tehran, Iran

2 Kiel University of Appliyed Science, Kiel, Germany

3 Mechanical Engineering Faculty, University of Tehran, Tehran, Iran

Abstract

The shape of wake behind a wind turbine is normally assumed to have a hat shape for the models used in wind farm layout optimization purposes; however, it is know from experimental tests and numerical simulations that this is not a real assumption. In reality, the results of actual measurements and detailed numerical simulation show that the velocity in wake region has a S-shape profile. The present study calculated a semi-analytical profile for the shape of the wake behind a wind turbine using blade element momentum method. It is shown that the wake shape differs in different operational conditions and geometrical characteristics of the wind turbine.

Keywords

Energy Equipment and Systems
Volume 3, Issue 1 - Serial Number 1
January 2015
Pages 13-24

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