Abstract
The field of biomimetics attempts to inspire and integrate the morphology and function of biological organisms into the design of human-made technology. In that organisms have been able to adapt through evolution, they have performed the “cost-benefit analysis” to solve a variety of problems of concern to humans and can potentially improve technologies. One example of a structural adaptation that can improve the aero/hydrodynamic performance of wing-like designs is based on the flippers of the humpback whale . The humpback whale is able produce small radius turns with its elongate, high aspect ratio flippers. This whale differs from related species in using maneuverability to capture prey. Maintenance of lift throughout a turning maneuver requires a modification of the wing-like flippers. The flippers possess rounded bumps , called tubercles , along the leading-edge. Empirical and computational studies have demonstrated that the tubercles passively modify the flow over wing-like structures. The flow between the tubercles produces counter-rotating vortices in a sacrificed separation that helps to energize the flow over the tubercles. The flow pattern over a wing induced by the tubercles increases lift, delays stall , and maintains low drag post stall. The tubercles have applications for aircraft wings, rudders, dive planes, skegs, sailboat masts, stabilizers, truck mirrors, bicycle wheels, rotor blades , propellers , compressors, pumps, fans , and tidal and wind turbines .
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Fish, F.E. (2020). Biomimetics and the Application of the Leading-Edge Tubercles of the Humpback Whale Flipper. In: New, D., Ng, B. (eds) Flow Control Through Bio-inspired Leading-Edge Tubercles. Springer, Cham. https://doi.org/10.1007/978-3-030-23792-9_1
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