Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The present work concerns aerodynamics of thrown objects from a 2.3 MW Horizontal Axis Wind Turbine (HAWT), as a consequence of blade failure. The governing set of ordinary differential equations for the flying objects are derived and numerically solved using a 4th order Runge-Kutta time advancing discretization technique and the sensitivity of the throw distance to the size of fragment, incoming wind velocity, and release tip speed and height are investigated both qualitatively and quantitatively. Computations suggest that the tip speed, at the release moment, is the most influential parameter for determining the throw distance and it is shown that when the turbine is operating in normal operating conditions (tip speed ratios of about 7 -with hub height velocity of 10m/s, resulting in blade tip speeds of about 70m/s), the fragments thrown from the turbine can reach between 100m and 500m, depending on their size. Thereafter, throw distance picks up exponentially with the tip speed. By comparing the throw distance calculations with and without dynamic stall model being active, it is concluded that dynamic stall does not play a major role in throw distances.
Original languageEnglish
Title of host publicationProceedings - 53rd AIAA Aerospace Sciences Meeting
Number of pages9
PublisherAmerican Institute of Aeronautics and Astronautics
Publication date2015
Article numberAIAA 2015-1494
DOIs
Publication statusPublished - 2015
Event53rd AIAA Aerospace Sciences Meeting - Kissimmee, FL, United States
Duration: 5 Jan 20159 Jan 2015
Conference number: 53

Conference

Conference53rd AIAA Aerospace Sciences Meeting
Number53
CountryUnited States
CityKissimmee, FL
Period05/01/201509/01/2015

Cite this

Sarlak, H., & Sørensen, J. N. (2015). Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure. In Proceedings - 53rd AIAA Aerospace Sciences Meeting [AIAA 2015-1494] American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2015-1494
Sarlak, Hamid ; Sørensen, Jens Nørkær. / Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure. Proceedings - 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2015.
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title = "Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure",
abstract = "The present work concerns aerodynamics of thrown objects from a 2.3 MW Horizontal Axis Wind Turbine (HAWT), as a consequence of blade failure. The governing set of ordinary differential equations for the flying objects are derived and numerically solved using a 4th order Runge-Kutta time advancing discretization technique and the sensitivity of the throw distance to the size of fragment, incoming wind velocity, and release tip speed and height are investigated both qualitatively and quantitatively. Computations suggest that the tip speed, at the release moment, is the most influential parameter for determining the throw distance and it is shown that when the turbine is operating in normal operating conditions (tip speed ratios of about 7 -with hub height velocity of 10m/s, resulting in blade tip speeds of about 70m/s), the fragments thrown from the turbine can reach between 100m and 500m, depending on their size. Thereafter, throw distance picks up exponentially with the tip speed. By comparing the throw distance calculations with and without dynamic stall model being active, it is concluded that dynamic stall does not play a major role in throw distances.",
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Sarlak, H & Sørensen, JN 2015, Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure. in Proceedings - 53rd AIAA Aerospace Sciences Meeting., AIAA 2015-1494, American Institute of Aeronautics and Astronautics, 53rd AIAA Aerospace Sciences Meeting , Kissimmee, FL, United States, 05/01/2015. https://doi.org/10.2514/6.2015-1494

Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure. / Sarlak, Hamid; Sørensen, Jens Nørkær.

Proceedings - 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2015. AIAA 2015-1494.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Sarlak H, Sørensen JN. Characterization of blade throw from a 2.3MW horizontal axis wind turbine upon failure. In Proceedings - 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. 2015. AIAA 2015-1494 https://doi.org/10.2514/6.2015-1494