Low-level jet height’s impact on wind turbine loads: A case study

Over the years, wind turbines have been steadily increasing in size, with newer models boasting larger dimensions. For instance, the diameter of an installed prototype offshore wind turbine in late 2022 was over 200 m, which is significantly larger than in 2010, where the average size was 90 m. This...

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Bibliographic Details
Main Author: Ahmed, Fahim Masud
Format: Dissertation
Language:English
Online Access:Request full text
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Summary:Over the years, wind turbines have been steadily increasing in size, with newer models boasting larger dimensions. For instance, the diameter of an installed prototype offshore wind turbine in late 2022 was over 200 m, which is significantly larger than in 2010, where the average size was 90 m. This results in new interactions between the wind turbine and the atmosphere in the form of Low-Level Jets (LLJs). The thesis aims to study the effect of a LLJ on the wind-induced response of a 15 MW offshore wind turbine. Engineering tools, i.e. TurbSim and OpenFAST, were used to simulate the turbulence boxes and the load response of a large offshore floating turbine. The results showed that the interaction between the LLJ profiles and the wind turbine response is not trivial, and the development of the loads as the LLJ height increases can’t be described by one single pattern. They were however closely related to the aerodynamic loads.