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Comparison Between Effects of Current Wind Turbine Design Loads and Downburst Loads
Wind turbines are among the most rapidly increasing technologies for delivering sustainable energy. Good wind sites are usually found in rural regions, where thunderstorms and strong wind events are becoming more frequent and destructive, as a result of climate change. Downbursts are one of these events linked with thunderstorms which occur in a sudden and localized manner. One of the challenges in the analysis and design of wind turbines under downbursts is that, the associated forces acting on the tower and blades depend on the characteristics of the event including its size and location. The review of current design codes for this type of structures shows a lack of procedures for estimating the wind loading on wind turbines due to high intensity wind events, such as downbursts. The wind loads used in those design codes are based on large-scale wind events. In the current study, a comparative study is conducted using the previously developed numerical model, HIW-TUR, on a variety of wind turbines in order to assess the differences between current wind turbine design loads and downburst loads. HIW-TUR accounts for different downburst parameters, such as the size, jet velocity, and the location relative to the wind turbine center, as well as the change in the pitch angle of the blades. An extensive parametric study is conducted considering a large number of downburst configurations and different blade pitch angles. Moments at the tower base and the roots of the blades are obtained under different downburst configurations and are compared with those calculated using the International Electro-Technical Commission IEC 61400-1 [10]. Using the same reference velocity, downburst loads on wind turbines are found to be higher than the design loads, resulting in higher straining actions on the tower and blades.
Comparison Between Effects of Current Wind Turbine Design Loads and Downburst Loads
Wind turbines are among the most rapidly increasing technologies for delivering sustainable energy. Good wind sites are usually found in rural regions, where thunderstorms and strong wind events are becoming more frequent and destructive, as a result of climate change. Downbursts are one of these events linked with thunderstorms which occur in a sudden and localized manner. One of the challenges in the analysis and design of wind turbines under downbursts is that, the associated forces acting on the tower and blades depend on the characteristics of the event including its size and location. The review of current design codes for this type of structures shows a lack of procedures for estimating the wind loading on wind turbines due to high intensity wind events, such as downbursts. The wind loads used in those design codes are based on large-scale wind events. In the current study, a comparative study is conducted using the previously developed numerical model, HIW-TUR, on a variety of wind turbines in order to assess the differences between current wind turbine design loads and downburst loads. HIW-TUR accounts for different downburst parameters, such as the size, jet velocity, and the location relative to the wind turbine center, as well as the change in the pitch angle of the blades. An extensive parametric study is conducted considering a large number of downburst configurations and different blade pitch angles. Moments at the tower base and the roots of the blades are obtained under different downburst configurations and are compared with those calculated using the International Electro-Technical Commission IEC 61400-1 [10]. Using the same reference velocity, downburst loads on wind turbines are found to be higher than the design loads, resulting in higher straining actions on the tower and blades.
Comparison Between Effects of Current Wind Turbine Design Loads and Downburst Loads
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Ahmed, Mostafa Ramadan (author) / Damatty, Ashraf El (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 19 ; 239-252
2024-01-13
14 pages
Article/Chapter (Book)
Electronic Resource
English
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