Shark skin-inspired designs that improve aerodynamic performance

@article{Domel2018SharkSD,
  title={Shark skin-inspired designs that improve aerodynamic performance},
  author={August G. Domel and Mehdi Saadat and James C. Weaver and Hossein Haj-Hariri and Katia Bertoldi and George V. Lauder},
  journal={Journal of The Royal Society Interface},
  year={2018},
  volume={15}
}
There have been significant efforts recently aimed at improving the aerodynamic performance of aerofoils through the modification of their surfaces. [] Key Result Through parametric modelling to query a wide range of different designs, we discovered a set of denticle-inspired surface structures that achieve simultaneous drag reduction and lift generation on an aerofoil, resulting in lift-to-drag ratio improvements comparable to the best-reported for traditional low-profile vortex generators and even…
Algorithmic-driven design of shark denticle bioinspired structures for superior aerodynamic properties.
TLDR
This research demonstrates that denticles play a similar role as vortex generators in energizing the boundary layer to decrease drag, and can be applied to a vast number of fields including aeronautics, oceanic, and automotive engineering.
Aerodynamic Characteristics of Shark Scale-Based Vortex Generators upon Symmetrical Airfoil
A series of wind tunnel tests were carried out to determine the effect of shark scale-based vortex generators (SSVG) on a NACA 0015 symmetrical airfoil’s aerodynamic characteristics. Three different
Aerodynamic Performance of Dragonfly-Inspired Corrugated Airfoils
Biomimicry is finding solutions to human design problems by taking inspiration from nature's strategies, developed from millions of years of evolution. A dragonfly's aerial maneuverability has been a
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings
Purpose With aims to increase the aerodynamic efficiency of aerodynamic surfaces, study on flow control over these surfaces has gained importance. With the addition of flow control devices such as
Hydrodynamic properties of biomimetic shark skin: effect of denticle size and swimming speed.
TLDR
The results provide new insights into the role of denticle size in shark swimming hydrodynamics across a range of locomotory modes, while simultaneously providing new design guidelines for the production of high performance low drag surface coatings for aquatic and aerospace applications.
Aerodynamic Performance of Shark Skin Shape Vortex Generator
The performance of NACA 4415 airfoils with counter rotating triangular or shark skin shape sub-boundary layer vortex generators were evaluated. This is relevant to the improvement of lift-to-drag
Light-Designed Shark Skin-Mimetic Surfaces.
TLDR
This work suggests that the novel photoreconfiguration technology, mimicking shark skin and systematically manipulating various structural parameters, can be used in a reliable manner for diverse applications requiring low-drag surfaces.
Experimental investigations on drag-reduction characteristics of bionic surface with water-trapping microstructures of fish scales
TLDR
The drag-reduction characteristics of the bionic surface with delicate water-trapping microstructures of fish Ctenopharyngodon idellus scales were explored by experimental method and it was discovered that the bionics created a rewarding drag- reduction effect at a low speed, and the drag-Reduction rate significantly displayed a downward trend with the increase in flow speed.
Controlling 3D deformations of bio-inspired active skins through designed geometrical imperfections
  • Yujin Park, K. Loh
  • Materials Science
    Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring
  • 2021
Certain biological organisms are born with shape, texture, and color morphing skin with the purpose of adapting to their surroundings or morphing their skin for camouflage, signaling, and hunting,
...
...

References

SHOWING 1-10 OF 46 REFERENCES
Shark-skin surfaces for fluid-drag reduction in turbulent flow: a review
  • Brian Dean, B. Bhushan
  • Engineering
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2010
TLDR
Due to the presence of small amounts of mucus on the skin of a shark, it is expected that the localized application of hydrophobic materials will alter the flow field around the riblets in some way beneficial to the goals of increased drag reduction.
The hydrodynamic function of shark skin and two biomimetic applications
TLDR
Digital particle image velocimetry of the flow field surrounding moving shark skin foils shows that skin denticles promote enhanced leading-edge suction, which might have contributed to the observed increase in swimming speed and might thus enhance thrust, as well as reduce drag.
Experiments with three-dimensional riblets as an idealized model of shark skin
Abstract The skin of fast sharks exhibits a rather intriguing three-dimensional rib pattern. Therefore, the question arises whether or not such three-dimensional riblet surfaces may produce an
Lift enhancement of an airfoil using a Gurney flap and vortex generators
Experimental measurements of surface pressure distributions and wake profiles were obtained for an NACA 4412 airfoil to determine the lift, drag, and pitching-moment coefficients for various
Biomimetic shark skin: design, fabrication and hydrodynamic function
TLDR
The ability to fabricate synthetic biomimetic shark skin opens up a wide array of possible manipulations of surface roughness parameters, and the ability to examine the hydrodynamic consequences of diverse skin denticle shapes present in different shark species.
Biomimetic spiroid winglets for lift and drag control
Hydrodynamic function of biomimetic shark skin: effect of denticle pattern and spacing.
TLDR
Quantitative hydrodynamic comparisons among skin models where control over manufacture allows alteration of design parameters provides a useful experimental tool for future work on the considerable natural diversity of shark skin denticles both among species and on different body locations.
Active Control of Flow Separation from the Slat Shoulder of a Supercritical Airfoil
Active flow control in the form of periodic zero-mass-flux excitation was applied at the slat shoulder of a simplified high-lift airfoil to delay flow separation. The NASA Energy Efficient Transport
...
...