Browse > Article

A Study on the Aerodynamic Load Characteristics of an Elliptic Airfoil  

이기영 (공군사관학교 기계공학과)
손명환 (공군사관학교 항공우주공학과)
김해원 (공군사관학교 기계공학과)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.6, no.4, 2003 , pp. 29-37 More about this Journal
Abstract
Using a wind tunnel testing, the aerodynamic load characteristics of an elliptic airfoil was described. The experimental data was obtained for angles of attack $-20^{\circ}$ to $+20^{\circ}$ with $2^{\circ}$ increments at a chord Reynolds number of $0.99{\times}105$ and $2.48{\times}105$. For each test case, chordwise suction pressure distributions and wake surveys were obtained. Static pressure measurements were made over a 10 sec averaging time at a 10 Hz sampling rate. For each case, wake survey was conducted with a pilot-static probe at 1.0c downstream from the trailing edge at very fine spacing to resolve the wake velocity deficit profile. As can be expected, suction pressure coefficient was increased with angle of attack. The normal force, CNmax, appeared peak value at the incidence angle of $12^{\circ}~14^{\circ}$, and the significant increase in profile drag at this range of angles of attack.
Keywords
Elliptic Airfoil; Aerodynamic Load Characteristics; Angle of Attack; Leading Edge Separation; Reattachment; Separation Bubble; Profile Drag;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Greenblatt, D., and Wygnanski, L, 'Effect of Leading Edge Curvature and Slot Geometry on Dynamic Stall Control', AIAA Paper 2002-3271, 2002
2 Gad-el-Hak, M., 'Micro-Air-Vehicles: Can They be Controlled Better?', Journal of Aircraft, Vol. 38, No.3, 2001, pp. 419-429
3 Barlow, J B., Rae, W. H., and Pope, A., Low-Speed Wind Tunnel Testing 3rd ed., John Wiley & Sons, INC., New York, 1999
4 스마트무인기 기술개발사업 1차년도 진도 평가 발표자료 스마트무인기기술개발사업단， 2003
5 McCroskey, W. J. and Fisher, R. K, 'Detailed aerodynamic measurements on a model rotor in the Blade Stall Regime', J. American Helicopter Society, Vol. 17, No.1, 1972
6 Park, Y. W, Lee, S-G, Lee, D-H, and Hong, S., 'Stall Control with Local Surface Buzzing on a NACA 0012 Airfoil', AlAA J, Vol. 39, No.7, 2001, pp. 1400-1402
7 Gad-el-Hak, M., Flow Control: Passive, Active, and Reactive Flow Management, Cambridge University Press, 2000
8 최성욱， 김재무， '타원형 에어포일 전산 유동 해석' 2003 항공우주학회 춘계학술발표회논문집， 2003. pp. 29 - 32
9 Gracey, M. W., and Galbraith, R. A. McD., 'Data for a NACA 23012C Aerofoil Pitched about its Quarter Chord Axis', G. U. Aero Report 8901, 1989
10 Leishman, J. G., Principles of Helicopter Aerodynamics, Cambridge University Press, New York, 2000
11 McCroskey, W. J, 'The Phenomenon of Dynamic Stall', NASA Technical Memorandum 81264, 1981