NF - 08 - 1 - 0433 540 - 231 - 9975 Final Report

Number of Papers published in peer-reviewed journals: Number of Papers published in non peer-reviewed journals: Unsteady Aerodynamics of Flapping Wings at Re=10.000 100,000 for Micro-Air Vehicles-Final Report Report Title The overall project goal was to investigate low Reynolds number (10,000-100,000) flapping flight for MAV applications. Large-Eddy Simulations (LES) is used for unsteady aerodynamic analysis. The dominant force producing mechanism is the formation of a spiral leadingedge-vortex (LEV). Effect of wind gusts and stroke deviation is investigated followed by the aerodynamics of a flapping fruit bat wing. Finally, very high Reynolds number dynamic stall on a pitching NACA-012 airfoil is studied. The work resulted in 3 archived journal publications,numerous conference proceedings,1 Ph.D. and 1 M.S. thesis. Two additional journal papers are under preparation. (a) Papers published in peer-reviewed journals (N/A for none) Enter List of papers submitted or published that acknowledge ARO support from the start of the project to the date of this printing. List the papers, including journal references, in the following categories: (b) Papers published in non-peer-reviewed journals (N/A for none) Tafti, D. K., Viswanath, K. and K. Nagendra, Deconstructing the Essential Elements of Bat Flight, APS 66th Annual Meeting, Division of Fluid Dynamics, 24-26 November 2013, Pittsburgh, PA. (c) Presentations 08/23/2013 08/29/2011 Received Paper 7.00 1.00 Kamal Viswanath, Tafti D. K.. Effect of Stroke Deviation on Forward Flapping Flight, AIAA Journal, (01 2013): 145. doi: Kamal Viswanath, Danesh K. Tafti. Effect of Frontal Gusts on Forward Flapping Flight, AIAA Journal, (9 2010): 0. doi: 10.2514/1.J050263 TOTAL: 2