Numerical investigation of low-noise airfoils inspired by the down coat of owls

Numerical analysis of airfoil geometries inspired by the down coat of the night owl is presented.
The bioinspired geometry consists of an array of ‘finlet fences’, which is placed near the trailing
edge of the baseline (NACA 0012) airfoil. Two fences with maximum nondimensional heights, ##IMG##
[http://ej.iop.org/images/1748-3190/14/1/016013/bbaaf19cieqn001.gif] and ##IMG##
[http://ej.iop.org/images/1748-3190/14/1/016013/bbaaf19cieqn002.gif] are investigated, where ##IMG##
[http://ej.iop.org/images/1748-3190/14/1/016013/bbaaf19cieqn003.gif] is the displacement thickness
at 2.9% chord upstream of the airfoil trailing edge. Wall-resolved large eddy simulations are
performed at chord-based Reynolds number, ##IMG##
[http://ej.iop.org/images/1748-3190/14/1/016013/bbaaf19cieqn004.gif] , flow Mach number, ##IMG##
[http://ej.iop.org/images/1748-3190/14/1/016013/bbaaf...]

Source: Bioinspiration and Biomimetics - December 7, 2018 Category: Science Authors: Andrew Bodling and Anupam Sharma Source Type: research