In a recent study, researchers have drawn inspiration from shark scales that are expected to be able to apply and enhance the aerodynamic performance of aircraft, drones, and wind turbines. After long-term evolution, sharks have developed a set of perfect biological structures with excellent aerodynamic performance. Harvard University and the University of Southern California's biological and engineer research team conducted a brand new study on sharkskin scales. It is hoped that the research results will enable the drone, aircraft, and wind turbines to further increase their air force performance.
The surface of the sharkskin looks very smooth, but in fact it can be observed under biological microscopy. It covers the tiny microscopic dentate shield scales. The sharks use the shape of the scales to significantly increase lift and reduce drag. If this design can be applied to the design of aircraft (airfoil), its air force properties can be greatly improved. Most of the research has focused on improving shark scales to reduce drag, and the team's research focuses on how shark skin scales increase lift. Common author George Lauder said, "We have small teeth scales similar to human teeth. A lot of understanding of the structure, but the specific functional aspects of the study still need to be developed."
The authors studied the gray shark, the fastest shark in the ocean, very specifically. Not only the CT scan was used to study its dentate scaly structure, but also the modeling and 3D printing were used to restore the structure of these three beam ridge edges, and these models were placed in the flow box with more than 20 different arrangements, positions, and sizes of models. Tested in the body.
They found that these dentate scales produced high-energy, microscopic eddy currents, which could significantly increase the lift of objects in air currents and liquid currents, raising the lift-to-drag ratio by as much as 323%.
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