Author
Al-Abadi, A., Ertunç, Özgür, Weber, H., Delgado, A.
Publication Date
2013-11
Publication Place
-
Wiley
Subject
Horizontal axis wind turbine, Optimization, Schmitz' theory, BEM theory, Power coefficient and performance measurements
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1099-1824
Record ID
00749751-688a-4f0f-9e04-97f9186fc99d
Library Location
Mechanical Engineering
Date
2013-11
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
An analysis method is developed to test the operational performance of a horizontal axis wind turbines. The rotor is constrained to the torque–speed characteristic of the coupled generator. Therefore, the operational conditions are realized by matching the torque generated by the turbine over a selected range of incoming wind velocity to that needed to rotate the generator. The backbone of the analysis method is a combination of Schmitz' and blade element momentum (BEM) theories. The torque matching is achieved by gradient-based optimization method, which finds correct wind speed at a given rotational speed of the rotor. The combination of Schmitz and BEM serves to exclude the BEM iterations for the calculation of interference factors. Instead, the relative angle is found iteratively along the span. The profile and tip losses, which are empirical, are included in the analysis. Hence, the torque at a given wind speed and rotational speed can be calculated by integrating semi-analytical equations along the blade span. The torque calculation method is computationally cheap and therefore allows many iterations needed during torque matching. The developed analysis method is verified experimentally by testing the output power and rotational speed of an existing wind turbine model in the wind tunnel. The generator's torque rotational speed characteristic is found by a separate experimental set-up. Comparison of experiments with the results of the analysis method shows a good agreement.
DOI
10.1002/we.1664
Cilt
17
