Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of turbulence intermittency on wind turbine loads under different atmospheric stability conditions: A multi-time scale analysis
The intermittent characteristics of turbulent motions can increase fatigue damage and reduce the reliability of wind turbines. However, the impact of intermittent turbulence on the aerodynamic loads of wind turbines under different atmospheric stability conditions has not been fully evaluated. In this study, wind velocity data collected from the Qingtu Lake Observation Array were employed to address this gap. The results indicate that turbulence intermittency in small time scales is strongest under convective boundary layer (CBL) conditions. Under different atmospheric stability conditions, the intermittency of turbulence tends to be consistent with time scales exceeding 48 s. The load intermittency of wind turbines is closely related to atmospheric stability and turbulence time scales. Specifically, intermittent turbulence under CBL conditions leads to the most significant load intermittency at shorter time scales, while its influence gradually weakens on longer time scales. The intermittency of wind turbine thrust is most pronounced when the turbulence time scale is comparable to the blade length. Similarly, the intermittency of the flapwise moment is most significant when the turbulence time scale matches the natural frequency (ft = 1.01 Hz). In contrast, the edgewise moment is less affected by atmospheric stability and turbulence time scales. This study provides new insights into the characteristics of turbulence intermittency under different atmospheric stability conditions and its impact on wind turbine aerodynamic loads, offering a scientific basis for the design and operational optimization of wind turbines.
Effects of turbulence intermittency on wind turbine loads under different atmospheric stability conditions: A multi-time scale analysis
The intermittent characteristics of turbulent motions can increase fatigue damage and reduce the reliability of wind turbines. However, the impact of intermittent turbulence on the aerodynamic loads of wind turbines under different atmospheric stability conditions has not been fully evaluated. In this study, wind velocity data collected from the Qingtu Lake Observation Array were employed to address this gap. The results indicate that turbulence intermittency in small time scales is strongest under convective boundary layer (CBL) conditions. Under different atmospheric stability conditions, the intermittency of turbulence tends to be consistent with time scales exceeding 48 s. The load intermittency of wind turbines is closely related to atmospheric stability and turbulence time scales. Specifically, intermittent turbulence under CBL conditions leads to the most significant load intermittency at shorter time scales, while its influence gradually weakens on longer time scales. The intermittency of wind turbine thrust is most pronounced when the turbulence time scale is comparable to the blade length. Similarly, the intermittency of the flapwise moment is most significant when the turbulence time scale matches the natural frequency (ft = 1.01 Hz). In contrast, the edgewise moment is less affected by atmospheric stability and turbulence time scales. This study provides new insights into the characteristics of turbulence intermittency under different atmospheric stability conditions and its impact on wind turbine aerodynamic loads, offering a scientific basis for the design and operational optimization of wind turbines.
Effects of turbulence intermittency on wind turbine loads under different atmospheric stability conditions: A multi-time scale analysis
Wang, Ya (Autor:in) / Li, Fengbin (Autor:in) / Cao, Feng (Autor:in) / Jiang, Yao (Autor:in) / Chai, Yongfen (Autor:in) / Wang, Yan (Autor:in)
01.01.2025
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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