FeatherEdge®
Quietly powerful serration
technology for your turbines.
Silence is golden.
When air moves, it makes noise. By adjusting turbine blade aeroacoustics, FeatherEdge technology directs air flow to mix at discrete locations to reduce noise emissions and improve turbine performance, benefits appreciated by operators, regulators, and the local community.
The Sound of Wind
What's that you hear? Noise from wind turbines in operation happens along the trailing edge of the blade. That's where air mixes rapidly from the pressure and suction sides of the blade, creating rapid pressure change.
Turbulence and associated noise from this area is known as turbulent boundary layer - trailing edge noise (TBL-TE noise). This unwieldy acronym represents the main cause of noise that humans can detect.
Power in Silence
Inspired by the design of the owl's silent flight, Biome's FeatherEdge turbine blade serration technology has been designed to address the challenge of TBL-TE noise.
Our novel technique of phase interference - a first for the industry - doesn't just cut the noise. It also pushes sound energy to higher frequency bands, reducing amplitude modulation. This in turn allows for improvements in the power curve by optimizing turbine controls.
Channel Power back to your Turbine
Early research from independent wind tunnel acoustic measurements conducted by Deutsche WindGuard GmbH and DTU's Poul la Cour tunnel showed noise reductions that are extremely promising for the industry. Recent field validation results have confirmed the potential above and beyond standard saw-tooth serrations..
REDUCE
sound power levels beyond
standard STE
by up to:
3.4
dB(A)
Whisper Quiet
FeatherEdge technology addresses the core issue of TBL-TE noise by applying our patented double-dip serration to the trailing edge. It is tailor made for the unique geometry of every radial span. This effectively reduces noise and improves performance.
Assured Silence
Biome is conducting several FeatherEdge projects with customers in North America and Europe. Campaigns adhere to strict IEC standards. If you are interested in participating, contact us to find out more.
2022 _ 09
This past summer, Biome performed an independent wind tunnel aeroacoustics assessment at Deutsche WindGuard GmbH at their acoustically-optimised large wind tunnel in Bremerhaven, Germany. The test measured the impact of our patented FeatherEdge noise reduction technology. The tunnel offered high wind speeds at low levels of turbulence, together with the most advanced drive and control techniques for ideal conditions for acoustic research and development.
Results showed a broadband noise reduction of up to 4dBA across several angles of attack, with a peak reduction of 7dBA. These promising results point towards the need for field test validations, which will be occurring in the coming months.
