1. 제 목 : OPTIMIZATION OF FLAPPING AIRFOIL PARAMETERS TO MAXIMIZE THRUST/PROPULSIVE EFFICIENCY





2. 연 사 : Dr. Ismail H. Tuncer





3. 일 시 : 2004년 8월 2일 (월) 11:00 - 13:00





4. 장 소 : 서울대 신공학관(301동) 117호 세미나실





5. 내 용 :


Based on observations of flying birds and insects, and swimming fish in nature, flapping wing propulsion has already been recognized to be more efficient than conventional propellers for very small scale vehicles with wing spans of 15 cm or less, so-called micro-air vehicles. The current interest in the research and development community is to find the most energy efficient airfoil adaptation and wing motion technologies capable of providing the required aerodynamic performance for a micro air vehicle flight. The flapping motion of an airfoil may be described by a combined sinusoidal plunge and pitching motions. The thrust generation and the efficiency of the flapping motion depends on the parameters such as the frequency and amplitudes of the plunge and pitching motions, and the phase shift between them. In our recent studies, these parameters are taken as optimization variables, and the thrust and/or propulsive efficiency of a single flapping airfoil and a biplane airfoil configuration are maximized using a gradient based optimization method. Unsteady, laminar and turbulent flows are computed using a Navier-Stokes solver on moving overset grids. Computations are performed in parallel in a computer cluster.





6. 약 력 :


Ph. D., Dept. of Aerospace Eng., Georgia Tech, 1988


Research Fellow, Georgia Tech, 1988~1992


National Research Council Research Associateship, 1992~1998


Professor, Dept. of Aerospace Eng., Middle East Tech. Univ. , Turkey, 1998~Present





7. 문 의 : 기계항공공학부 김종암 교수 (☏ 880-1915)