Effect of Peak Shape in Bio Inspired Corrugated Wing
8 Pages Posted: 12 Feb 2018
Date Written: December 21, 2017
Present computation study deals with the effect of bio-inspired corrugation on natural low Reynolds number flyers like insects specifically the dragonfly. In this paper, the effect of variation of first peak shape is studied with triangular peak and a curved peak shape of airfoil. Ansys Fluent software is used to simulate the aerodynamic forces like lift, drag and lift to drag ratio. The models are meshed using ICEMCFD with rectangular block meshing. Numerical simulations are performed at a Reynolds number of 3.5x104 and angles of attack ranging from - 4° to 12°. The k-ε turbulence model is used to implement the turbulent condition in flow domain. The boundary conditions and size of flow domain were taken as per the available experimental wind tunnel facility. The flow parameters such as velocity and pressure contours of the curved and triangular peak corrugated airfoil are obtained computationally and compared with each other for same chord, camber and thickness. The aerodynamic and flow parameters indicate that the curved peak corrugation model produced better results than the triangular shaped corrugation. The leading edge vortices found trapped in both the models in same location in the first valley, however trailing edge vortices are not observed for tested angles of attack (upto 12 degrees) in both the models.
Keywords: CFD, Corrugated Airfoil, Flow Behavior, Leading Edge Vortices, Micro Aerial Vehicle
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