Serrations on wind turbine blades

Noise reduction mechanisms of sawtooth and combed

Trailing-edge serrations are add ons retrofitted to wind-turbine blades to mitigate turbulent boundary-layer trailing-edge noise. This manuscript studies the physical mechanisms behind the noise reduction by investigating the far-field noise and

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6 FAQs about [Serrations on wind turbine blades]

What are wind turbine serrations and how do they work?

Serrations help to reduce noise emissions and bring the turbines back to a higher mode of operation. This can increase your AEP by up to 5%. Trailing edge serrations (TES) reduce the noise of the so called “turbulent boundary layer trailing edge noise”. This is the dominant noise source of a wind turbine.

Should a wind turbine rotor blade be trailing edge serration?

Author to whom correspondence should be addressed. For the rotor, achieving relatively high aerodynamic performance in specific wind conditions is a long-term goal. Inspired by the remarkable flight characteristics of owls, an optimal trailing edge serration design is investigated and proposed for a wind turbine rotor blade.

Do trailing edge serrations reduce wind turbine noise?

Other experimental investigations on trailing edge serrations focused on full scale applications of wind turbine blades: Oerlemans et al 8 tested, for example, serrated trailing edge extensions in a real-wind turbine of 94 m of rotor diameter and obtained noise reductions of 3.2 dB due to these passive devices.

What are the benefits of installing serrations on my turbines?

Improve the noise emission of your turbines by installing serrations. Noise regulations force many operators to run their turbines in a noise-reduced mode especially at night. Serrations help to reduce noise emissions and bring the turbines back to a higher mode of operation. This can increase your AEP by up to 5%.

What are serrated patterns in wind turbines?

So-called serrated patterns are already being successfully used in wind turbines to reduce airflow-generated noise . ... ...

Does a serrated blade affect the power production of a wind turbine?

To analyze the influence of the serrated blade on the power production of the wind turbine a dynamic power curve based on the IEC 61400–12 Ed. 1.0 guidelines [ 16] has been performed. Several cases for each wind speed from 3.5 m/s to 25 m/s each 0.5 m/s using different wind seeds have been simulated in normal operation.