Fatigue Testing of the Small Wind Turbine Blade

Zawadzki, Karol; Baszczyńska, Anna; Fliszewska, Angela; Molenda, Szymon; Bobrowski, Jakub; Sikorski, M.

doi:10.18178/ijmerr.11.4.269-274

Cited by 3 publications

(1 citation statement)

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“…This results in an emergence of cyclic loads to which the wind turbine rotors are subjected. Such a non-uniformity of exerted forces may lead to higher fatigue and maintenance/service costs [19]. Thus, actions undertaken focus on eliminating or at least limiting the wake influence on turbines located downstream.…”

Section: Wind Flow Influence On Individual and Clustered Wind Turbinesmentioning

confidence: 99%

Experimental Investigation of the Cooperation of Wind Turbines

et al. 2022

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The article discusses the wind tunnel experimental investigation of two turbines (the downstream unit placed fully in the wake of the upstream one) at various turbulence intensity levels and wind turbine separation distances, at a Reynolds number of approximately 105. The velocity deficit due to the upstream turbine operation is reduced as the wake mixes with the undisturbed flow, which may be enhanced by increasing the turbulence intensity. In a natural environment, this may be provoked by natural wind gusts or changes in the wind inflow conditions. Increased levels of turbulence intensity enlarge the plateau of optimum wind turbine operation—this results in the turbine performance being less prone to variations of tip speed ratio. Another important set of results quantifies the influence of the upstream turbine operation at non-optimal tip speed ratio on the overall system performance, as the downstream machine gains more energy from the wake flow. Thus, all power output maximisation analyses of wind turbine layout in a cluster should encompass not only the locations and distances between the units, but also their operating parameters (TSR, but also pitch or yaw control of the upstream turbine(s)).

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Section: Wind Flow Influence On Individual and Clustered Wind Turbinesmentioning

confidence: 99%

Experimental Investigation of the Cooperation of Wind Turbines

et al. 2022

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Stress diagnostic and monitoring of blade in rotational motion

Jeżyński,

Smaż,

Brzozowska

et al. 2024

AIP Conference Proceedings

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Aerodynamic design of wind turbine blade with second derivative of thickness distribution as constraint

Zhang²,

Song

et al. 2023

J. Phys.: Conf. Ser.

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In order to make more use of wind energy, large-scale wind turbine blade size is the trend of development. With the increasing of blade length, the design and manufacture of the structure with the requirements of safety and economy are faced with great challenges. It is most sensitive to the blade manufacturer to reduce the composite lamination and production cost as long as the stress and strain level of the structure is satisfied. Therefore, the ideal thickness distribution requires not only the thickness monotonically decrease along the radial direction, but also the concavity and convexity of the thickness distribution function are required to be constant. Based on the in-house design code SurroOpt and the momentum-blade theory method, an optimization design platform for wind turbine blades was established. A 400kW wind turbine blade design was carried out with the aim of maximizing the output power and the constraint of the second derivative of the thickness distribution. The results show that the concave-convex characteristic of thickness distribution function has not changed, which is beneficial to the structural design. The designed blades have been manufactured and installed for operation. For the whole device, the maximum coefficient of wind energy utilization (including the loss of motor and machinery) reaches 0.42, which is 2.4% higher than 0.41 of the same kind of products.

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Fatigue Testing of the Small Wind Turbine Blade

Cited by 3 publications

References 0 publications

Experimental Investigation of the Cooperation of Wind Turbines

Experimental Investigation of the Cooperation of Wind Turbines

Stress diagnostic and monitoring of blade in rotational motion

Aerodynamic design of wind turbine blade with second derivative of thickness distribution as constraint

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