Scientists have long been interested in the special epidermal structure of sharks to reduce swimming resistance. Fraunhofer Institute of Production Technology and Applied Materials, Germany, said on the 18th that researchers at the institute have developed a shark-like surface coating that can significantly improve the aerodynamic performance of wind turbine blades, thereby increasing power generation efficiency. , reduce noise.
According to the researchers, the shark epidermis has a groove-like structure in the swimming direction. Scientists believe that this structure can reduce the surface friction resistance in turbulent flow. Experts from the Fraunhofer Institute for Production Technology and Applied Materials have developed a shark-like coating developed by him on the blades of a wind turbine, and have verified that this coating can increase the lift-resistance ratio of the blades. More than 30%. The lift-to-drag ratio is the ratio of lift and drag of the aircraft. The higher the ratio of lift to drag, the better the aerodynamic performance.
The researchers also said that this kind of shark-like coating that can replace the traditional coating will not increase the weight of the wind turbine blades, which can improve the power generation efficiency. It is estimated that the annual output of a wind turbine can be increased by 5% to 6% each year. , And can reduce noise. (Reporter's classmate)
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