A Review on Bio-inspired Airfoil: Inspiration from Nature

With the advancement of modern technology, researchers have been working hugely on the aerodynamics with a view to improving and enhancing the performance of the existing airfoils. Several numerical as well as experimental investigations have been performed in this regard. A breakthrough in the field of aerodynamics is the modification of airfoils getting inspired from nature. This paper reviews the works on such airfoils. Researchers have tested several parameters to find out their effects on the overall performance of the airfoils. Modifications on the geometry of the airfoil have been investigated. Different Reynolds numbers have been used to analyze their effect on aerodynamic performance of the corresponding airfoil. The inspiration for such airfoils has originated from the low flight insects like butterfly, dragonfly etc. The places where conventional air vehicles can’t reach, Micro Air Vehicles (MAV) can play an important role especially in military use for security purpose and so on.