“The reason for the noise,” explains N. Peak, “is that the flow of air, passing over the surface of the wing, creates vortices. The structure of the wing of the owl nullifies the arising noise due to the smoothing, dispersion of the air flow, which makes the flight of the bird almost noiseless. “
Based on the research of the owl wings scientists have developed a “silence technology”, which has already begun to be implemented. At the presentation at the Institute of Aeronautics, Astronautics and Aeroacoustics, Nigel Pick and his colleagues presented a method for reducing the noise of wind generator blades.
To do this, they covered the blades of the windmill with a cloth, which is usually used in the manufacture of a wedding veil. When rotating, it performed the functions of owl feathers, reducing noise. However, for industrial use, this is unsuitable, so it was decided to create special plastic coatings printed on a 3D printer , which ultimately reduced the turbulence of turbines by 10 decibels.
Scientists hope that their research will help in the creation of wind turbines and aircraft engines with low noise.